The Police – “Wrapped Around Your Finger”
Music videos have made interesting use of varying camera speeds to create unusual effects. The Police used it in “Wrapped Around Your Finger” – by running the camera at 200% speed and a sound track for the band to sync to during the shoot at 2x, they created the effect of Sting and the boys moving curiously slow, but in time with the music.

U2 “With or Without You”
Due to low lighting on the set of U2’s “With or Without You” they were having problems getting the shots in focus. The director, Meirt Avis, suggested shooting at 6.25 fps (1/4 the standard 25fps in Britain) to get 2 stops more light and thus more depth of field. The finished footage was then printed with 4 frames for each original frame, bringing the final frame rate back to 25 fps. The end result was a stylized slo-mo/regular speed effect.

A great interview with Daniel Pearl, the cinematographer of both these videos, can be found here:
http://www.cinematography.net/Pages%20DW/Candle_Effect.htm