♪ to change our lives and reach teach ♪ >> it's very original and it's a little subversive. you've got that element of, oh, i've never seen that before. so i love this. i like musicals. >> as simple as it may look, breaking out into song in class took a fair amount of planning. mike and his band of pranksters picked the largest lecture hall they could find, which turned out to be a chemistry class. >> the night before we sort of set up how we would go about it. so the day of the prank, we walked into the classroom like we were just students in that class. and i was miked. there was a boom box all set up. one cameraman was stationed outside. the class began and my cue was to stand up and scream, hey teach, i've got a question. i don't think i can describe to you accurately just how scared i was.