Liquid nitrogen explodes a soda bottle in just a few seconds. Enough to send a bucket a few hundred feet into the air.
The set up
a strong 5 gallon bucket (no handle), a metal bowl filled 1/2 way with water, a 1 liter plastic bottle
fill 1/8of the plastic bottle with liquid nitrogen and cap (****note this is not a bomb)
quickly place in the bowl with water and cover with the bucket
***Another Note- never look under the bucket