Fun with liquid nitrogen

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. (Coulter C. Henry, Jr.)...

Try taking a ping-pong ball and poking a small hole in it. The hole has to be tangent to the sphere of the ball. When poking the hole use a pin and the pin should be almost flat agianst the ball. Basiclly you want a hole in the side of the ball that will cause the ball to spin. Submerge this ball into the liquid nitrogen and let it fill up. Place the ball on a table and watch it spin. As the nitrogen goes back to a gas it will rush out the hole and presto!! It's pretty cool. If it does not spin try placing your hand on it to warm it to get it started.