Editing Liquid Nitrogen (section)

===Racquetball===

# Show the Racquetball to the audience, and bounce it a few times to show that it is elastic. Lock the tongs on it, and put it in the liquid Nitrogen. You might need to use the ladle as well to keep it submerged.
# While the racquetball is cooling, explain what is happening to the audience
# After 1-2 minutes, put on the cryo gloves and take the racquetball out. Drop it on the table to show that it has little elasticity, making note of what sound it makes.
# If you have a back wall that is concrete or similar, throw the ball against the wall to shatter it. If the floor is concrete or there is a metal plate, throw it against it to shatter the ball. 
##'''Do not throw it against a wood wall or wood floor'''; it will bounce off! If there are no sufficiently hard surfaces, then hold the ball on the green board, and hit it hard with the hammer to shatter it.
# Show one of the shattered pieces to the audience, and have a fellow presenter heat up one of the other pieces to show that it regains elasticity once it is warm again.