This video shows a number of rocket launches in slow motion. They were filmed at the May, 2008, ROCK launch.
The videos were recorded using a Casio EX-F1 camera. The camera can record full 6MP images at up to 60 frames per second and smaller images at up to 1200 frames per second.
The above video shows scenes recorded at 300 fps, 600 fps, and 1200 fps. My favorite is the Space Shuttle launch at 1200 fps. The model rocket makes a roll which, in slow-motion, mimics the real Space Shuttle.