MIT professor and Web star Walter Lewin swings from pendulums and faces down wrecking balls to show students the zany beauty of science.

Walter Lewin is not merely dangling at the bottom of a 15-foot pendulum. He is swinging high and wide, his rapt audience of 300 counting off each cycle.
At 71, he's likely missed his window for a shot at Cirque du Soleil, but the Netherlands-born MIT physics professor seems happy with his own high wire act -- revealing to students, in the most unorthodox ways, the beauty of science.

MIT professor Walter Lewin's elaborate physics demonstrations are a hit in the classroom and online.His pendulum ride comes at the end of a lecture on Hooke's Law, in which he proves the pendulum's period, or time that it takes to complete one cycle, is not affected by the mass at the bottom -- in this case, his own body.
He will also, on other occasions, suck helium and continue his lecture sounding like a Dutch Daffy Duck to highlight the differences in the speed of sound in certain gases. He'll shoot across the classroom stage astride a bicycle mounted with fire extinguishers to demonstrate a rocket's change in momentum.
"It took me a decade to come to the realization," says Lewin at his MIT office, "that really what counts is not what you cover, but what counts

That guy rules.

High Wire Act