"Lonesome" George Gobel, Dean Martin, and Phil Harris collectively destroy Ode To Billy Joe.
The Who's infamous performance of My Generation on the Smothers Brothers TV variety show, during which Keith Moon packed his bass drum with double the amount of pyrotechnics he normally used on state. The resulting explosion cost Pete Townshend part of his hearing.
All six Rocky movies in five seconds. There are a lot of "a movie in five seconds" clips, but this one by far is the funniest.