From The Guardian, UK:

Walter Lewin is not your average Massachusetts Institute of Technology professor. He teaches introductory physics with a difference: electric charge is demonstrated by beating a student with cat fur, he rides a fire-extinguisher propelled tricycle across the lecture hall to show how a rocket lifts off. ....

....Each lecture, complete with stunts (others have included making himself into a pendulum and firing golf balls at a stuffed monkey in a bulletproof vest) takes about 25 hours to prepare....

The lecture videos can be downloaded! Check them out at the MIT site.