thats The Shit!

That was great. I suggest using black powder like my brother and I used to with either thick cardboard tubes. or thin steel tubing (but use eye gear if you use the steel tubing).

Oh yeah that's amazing, great work!

the birds chirping in the background make this kind of surreal. Awesome effect.

whoa ....thats mint

may i embed this in my blog?
it was really great. and such a cool idea.

That was epic! :D

SWEET! I saw this on TV first.

Had you allowed your video to be downloaded, the production crew of Mythbusters might've been able to play your footage in full-blown (not 24p downsampled, but full 60p) HD on the air. That would've been sweet.

Ben,

A great video!

A couple of things to consider if you do want to tweak the next one.

You do not really want to use oxygen! This will lead to faster burn (explosion) and you will get more of a concussion and flash at ground level. The reason your explosion got such a good rolling upward effect is because it was a fairly slow burn.

On the flour question. Flour can be really really dangerous. It has a much smaller grain and results in a lot more surface area to flash burn. If you want to see how much energy a flour explosion gives off you can do this little experiment. Get about 30 feet of rubber surgical tubing. Hook one end up to an old fashion tire pump or compressed air. ON the end anchor the tube to the ground without compressing the tube. Place 2 tablespoons of flour directly in front of the tube. Place a lit table candle next to the flour. Cover the whole thing with a large 3 lb can or some such item. Give the tire pump a really good push. The flour will become airborne under the can...the candle will ignite the flour...the can will go about 30 feet in the air. You can imagine what 200 lbs of flour would do. When I was in college they would do a similar set up to show the dangers for dust explosions. Except we used an old rock quarry and 50 pound bag of flour. We would get a couple hundred cubic feet of flour dust. The resulting explosion was akin to a couple sticks of TNT.

As always have fun but be safe. Oh if you get too good at this stuff the ATF will show up at your door.

looks fun, and dangerous.

my friend who works in the army said flour bombs are nasty.

I love the sound of the fireball. Very cool.

That's pretty impressive but why not just use Action Movie Essentials 2?

Brutal.

Did you pack the sawdust? To how much pressure was the air compressed? I already had a successful experiment with 6 atmospheres and I'm considering raising to 10.

Flour works too. And coffee whitener.

Need explosions for our movie too, lol, come on over :)

very nice. As a former paramedic for safety consideration I suggest an electric igniter for your flame source, so you can activate the compressed air system, -then- activate flame, then fire... even a .01% chance of accident is too much, burns are awful. Cheers!