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October 15, 2007

Seattle, Washington
An Important Tidbit About Hard Drive Technology

Alright, look, I haven't got a lot of time, so let's just get this out of the way.

Hard disks don't write in weightless environments. That's the crux of the matter. All other details are incidental.

I showed up at an office park address near the Vegas strip a little after 8am. Zero G rents space for the pre-flight orientation. Suited up and watched the training video. Loaded onto a bus for the ride over to the airstrip.


Stood outside the Zero G plane with the 35 or so other passengers. The group was mostly older, except for a handful of high school students who'd won some sort of science competetion, and also the older brother from Malcolm in the Middle.

The plane is a hollowed-out 727. Pretty small as commercial jets go, but with the overhead compartments removed, I could only just touch the ceiling.

They've left enough seats in the back of the plane for everyone to buckle in during take-off and landing. Once they reach cruising altitude, everyone moves into one of three rectangular zones running the length of the cabin. Your socks are colored to match the rectangle you're supposed to stand in. This keeps people somewhat-evenly dispersed during weightlessness.

I was placed in the front-most section, up against the bulkhead. This was one of the requests Zero G filled to accomodate my dancing clip. The other was pairing me up with Todd, a crew member who volunteered to hold the camera. Everyone at Zero G was familiar with my video and they were very generous in helping out.

To create the effect of weightlessness, the plane performs a series of 15 ascents and dives. They call them parabolas. In the ascent portion of each parabola, passengers are pulling two G's. A G is a unit for measuring the force of gravity. One G is equivalent to earth's gravity, so pulling two G's means you weigh twice as much as normal.


They have everyone lie down during ascents. This keeps the blood evenly dispersed in your body and minimizes the likelihood of passing out. It's pretty unlikely to begin with -- two G's isn't terribly burdensome -- but whatever.

As the plane reaches the summit of the first parabola, the 2 G's shifts to about 0.4 G's in the span of a few seconds. This approximates Martian gravity. They had us all do push-ups, and then attempt one-handed push-ups.

Zg144_0071 Zg144_0077

This period lasts about 25 seconds. We get a 5 second warning, at which point we have to return to a lying down position before we get heavy again.

The second and third parabolas bring you to about 0.2 G's, which is lunar gravity. At this point, one-fingered push-ups aren't much of a challenge. Pushing up with vigor could smack you into the ceiling.

From there on out, it's 0 G's as we plummet from 32,000 to 24,000 feet, then climb back up to do it again.


One of the great things Zero G does is encourage you NOT to try to take pictures during the flight. It costs a lot of money to get up there, and it's a shame to waste that time snapping away, so they provide a designated photographer who goes around taking high-quality photos of each passenger.

I learned of another reason not to take a camera onboard -- the little Canon I had stuffed in my thigh pocket was crushed and destroyed. I don't use those cameras to shoot the dancing video anymore, but they're good for snapshots, so I thought it'd be a good idea to keep it handy.

It wasn't.


They hand out packets of M&Ms and small water bottles so you can play around a bit.

The water is cool while it lasts, but when the plane levels, it hits the ground like the water creature in The Abyss and everyone just ends up mildly confused and moistened.


The M&Ms are fun, but here's where it gets frustrating: 35 people who've never done this before stuffed into a 727 and given 25 seconds to fulfill their childhood dreams. The equation translates into a lot of uncoordinated flailing and smacking. My Zen moment of staring in silence at the floating, candy-coated confection was repeatedly interrupted by middle-aged men doing cannonballs into my face.


You pretty much have to give up on meditative bliss and go with the mosh pit mentality.

Another thing: I went by myself and I didn't have time to get acquainted with any of the other passengers, so there was no one to bounce back the unbridled joy that comes with the experience. When your ass suddenly flips over your head and up is no longer up and down is no longer down -- no matter who you are -- you become 8 years old. It's really the sort of thing you want to share...which makes me reflect on Alan Shephard and John Glenn and those other first few guys -- the absolute solitude they must have felt up there.

There was no barfing, fortunately. I didn't have any problems at all in that regard, and I didn't see anyone else looking queasy. It's much less bothersome than rough seas, and it hardly lasts long enough to become a problem.

Here's Malcolm in the Middle guy.


I have no explanation for this.


For the last 5 parabolas, I brought out my camera and moved up against the bulkhead, where my designated cameraman and I got ready to shoot some dancing clips.

This is the part where I learned about the aforementioned. I'm shooting this new video on an HD camera that stores its footage on a 30 GB internal hard disk. Each time we'd go weightless, the camera would start recording and get about 4 seconds of footage before shutting down. Again and again we tried, and each time, it failed. I'd record during the 2 G ascents with no problems. Then when weightlessness set in, it would shut down every time.

None of the flight crew had heard of this problem. They position their own HD cameras all over the plane, but they record onto magnetic tape and it works fine.

I spoke to a Zero G technician afterwards and he theorized something about the gyroscopic effect of the spinning hard disk platters being thrown off by the lack of gravity. The magnetic heads lose their place while writing and give up.

I found another possible explanation in a technical forum: some hard disk drives are designed with a fail-safe mechanism that detects when the device is in free-fall. If an object is falling, it's fair to assume it's going to hit the ground soon. And when it hits the ground, the data will be more secure if the writing mechanism has stopped. What we were doing was, essentially, free-falling, so the camera decided it was about to get smashed and went into the electronic equivalent of fetal position.

Whatever it was, it meant I didn't get the dancing clip I wanted. All I have is a couple promising seconds of what would have undoubtedly been one of the best parts of the video.

Boo hoo, right? I'm sure I'm getting lots of pity right now.

As mentioned, Zero G tickets are expensive (How expensive? Oh, go check for yourself). I can't really swallow the cost of a second ticket, but I've got a lot of time and I'm disinclined to give up on stuff like this.

I'm going to work on a solution.

In the meantime, I really must be going. I leave tomorrow for five weeks alone in the South Pacific.

First stop: Tonga. Jumping in the water with humpback whales.

...buckets and buckets, just spilling over with pity.


I guess there are a few occasions when it's cool to have pictures of yourself eating.

Expensive trip - too bad the technologies collided. Maybe you can use this to get a group of friends (and/or fans) together for a full flight rental. Talk them into more time and fewer people on the flight.

Maybe Stride will pony up for another flight? You'd have to promise that their logo would be in the upper corner of the clip where you danced in zero gravity. Heck, maybe a pack of Stride gum could float weightlessly with you? Or you could open the pack and 14 pieces of Stride gum would run free while you dance.

Aw, dude that sucks. You really should try to figure out a way to do it again; it's just too awesome not to be in the video.
Good luck with that.

Actually, Martian g is 0.37 and lunar g is 0.1.

I am an enormous nerd.

perhaps its time to hit the flash manufactures (micron/intel) up for a sponsorship

for what its worth (and it's not), purple guy is "Action Man" or "Fitness Man" or some such (forgot exact name now) - he's from Anytime Fitness, and ran in the Red Bull soapbox race (the wheels fell off his soapbox) in Seattle here a couple of weeks ago

Too bad about your bad luck... :( Thank you for the synopsis (sp?) of how the whole flight goes down. It sounds outstanding. I'm not surprized about the "mosh pit" scenario, but it is too bad. Still, looks like you had fun...

LOL LOL! You have such a great sense of humor! I love your perspective on life.
$3,700.00 bucks! I like the imagery of the Stride Gum floating all about.Cheaper yet exciting alternative: How about a bungie cord? As you are rebounding (how many do not?) you could do the dance!
Sakanta Running Wolf, Global Peace Global Healing.

Looks like great fun Matt. Zero sympathy for you on the video stuff up. RTFM!!! It's a feature documented in the manual. Also it doesn't recommend bringing the camera above 15,000ft. As a (former) techie u should have known better. tsk-tsk. Sony has a HD model that records to solid state cards now. That would probably get around the problem. The successor, SR-100 has a drop sensor you can turn on and off, dunno if you can on the sr1 or not. Have a play.

Better luck next time.


I'm all for your going back up there. Cause I notice your dancing is improving. As you inevitably get more coordinated you will need more and more creative ways to dork it down to the level of the rest of us.

Matt, great that you got to ride on a "vomit comet." (That's NASA's name for their's, anyway...) Too bad about the vid...solid state is probably the best answer. Maybe they'd cough up the bucks, use you for a comericial, and get everybody what they want all around. They get an internet icon (yep, you is!) for a new commerical spot ("because technology needs to be able to go where you do") and you get wieghtless again.

Totally killer idea about the dance in zero gee, tho...
But at 25 seconds an arc, isn't Stride gum's long lasting flavor sort of over kill? Any gum lasts that long... (Sorry, now I'm in ad-mode.)

Enjoy the sun and surf! Maybe you should check out the Keeling Islands (Grand Keeling is also called Cocos Island, part of Austrailia) in the Indian Ocean. Very cool place to shoot a video, what with the reef walk, the North Point Men's Club and all that...

Hahah Oh man Matt.
That's awesome, but very unfortunate for your camera, and you're disability to record the camera.
But you had your experience! And that's great.
Surprisingly, my Physics teacher was talking about this plane, dubbed the "Vomit Comet" Lol.
Anyway; keep it up with these videos man. Good work on everything.

I was considering saving up to that, but then I realised that you didn't get much freedom and are restricted to a tiny space. Everyone wants to do something different, and everyone is in each other's way.

But they must be some way to sort that out without being a squillionaire.

Where the hell is Matt?

I got really excited about doing this myself until I visited the website and saw the price. Unfortunately I'm a poor art student who needs to eat occasionally. Damn. Maybe someday I'll become a famous animator and have the money. Hey, it could happen...maybe.

That stinks that you didn't get the footage. Maybe you could cheesily blend those 4 second shots together. I know. Lame. But, it's a suggestion for another outtake video.

+1 on the Anytime Fitness man post, he said what I was going to say. But you know, just in case you didn't believe it.

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