I've been incorporating a great deal of digitized movie clips into my lectures, as well as sound files. The students seem to enjoy these, and they help the students to pay attention. Mostly I've done this in my Torah of Israel class, where we show clips from Moses movies such as the 10 commandments when relevant. I've also put in clips of sound files, such as Louis Armstrong singing Go DOwn Moses, and Billy Crystal's comedy bit about Edward G. Robinson miscast in 10 Commandments. I believe comedy helps me in teaching.