This experiment takes a little karate and an understanding of air pressure. If you lay a yard stick down on a table and hit it with your best karate-chop, what will happen to the stick? Will it break? Most likely it will flip off the table and wing someone in the eye. So how do you hold down the stick so you can break it with your all powerful Hiyah? All you need is a piece of newspaper and air.
For more on this demonstration, read the Heavy Newspaper experiment.