Your own freeze ray. Hehe

[Humdizzy]

I don't know if you guys know this but I was playing with my canned air and I turned it upside down and sprayed it on my wall and all this white stuff came out that put a sheet of ice on my wall. I wikied it and it's called freeze spray. It's really cool. I tried it with water and it turned some into ice crystals.

If you have canned air try it.

 

[matrics]

Yeah, I think it's because the rapid decompression of gasses is an endothermic process (takes up heat from the surroundings). It's the same with propane tanks or CO2 tanks. I've heard of paintball gun barrels that froze over because they were fired too much on full-auto.