Phantastic Physics Demos: The Blow Out Challenge
A great proof of Bernoulli's principle is to challenge someone to blow a Styrofoam ball out of a funnel. The top of a 2 liter soda bottle makes a perfect funnel and the ball should be between 4 and 6cm in diameter. As a result of Bernoulli's principle, the challenge proves to be close to impossible. A video of someone taking the challenge is shown below...
