Fun with N2!

 Cam needed a really good interference-fit for a project, so he bored a hole .0015" under the shaft size, and heated the plate up to 250F -- no chance (at 65 millionths per degree per inch, he needed more degrees!)
 


So he picked up a few litres of liquid nitrogen down at the welding store, and soaked the shaft for a while, then slipped it easily into the hole, where it's formed one heck of a bond ("Why didn't you just weld it?!?")!
 


Much to his (and our) disappointment, this resulted in quite a bit of leftover nitrogen, which was slowly returning to its normal room-temperature gaseous state. There seemed little choice but to perform some very serious scientific research, starting with hot dogs (the pieces, after a gentle tap, have the oddest sound -- like the polishing pellets in a metal tumbler!), and moving on to a small flower.
 With those tests complete, we were left with only dangerous and quite possibly explosive research on the bursting strength of a 20-ounce plastic soda bottle.

I don't have time to upload the resulting video, so stay tuned for further details -- and kids, don't try this at home!