I love slow-motion video. It makes even the most mundane subject-matter fascinating, let alone cheerleaders and fire-breathing Frenchmen - the subjects of a video I was sent by my friend Olof:
I-Movix SprintCam v3 NAB 2009 showreel from David Coiffier on Vimeo.
Incidentally for any mathematicians out there, Olof's recently launched Tricki, a collaborative wiki collection of mathematical know-how. It's far beyond my rudimentary skillz but I really liked the way the comments feature works - it structures them sequentially according to which part of the articles people are referring to. Check it out.