Fun with air pressure and a vacuum.via Neatorama
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now to make it explode...
Seems like a waste to destroy it, but still awesome!
My chemistry teacher showed us some pictures about when this happened by accident. Some guys were cleaning the inside of a tank out with pressure cleaners (hot). When they were done, they closed all the valves and the hatch. As it cooled, the hot water vapor condensed and the tank imploded. It was right after doing the soda can of boiling water inverted into cold water demo.
ohh, i remember that lab experiment. it was awesome. i kept the can for a year, then threw it away.
It seems to have been deliberately done (if you follow the links back) - quite an expensive training video!
ahhhh sweet! was my first reaction :D