Here’s a huge list of things you can do with liquid nitrogen, including how to make ice cream with it. My other favorites on the list seems like a really messy prank (but MAKE pal Rob seems to have debunked it)- “Freeze a can of shaving cream and then peel the can away from the cream. Put the canless cream into someone’s car. Let the oven-like heat from the car’s sitting in the sun defrost the shaving cream. 2 cans will fill an entire car.” Link.