Prof. Ningyu Liu, from NASA'S Geospace Physics Laboratory in Florida, recently filmed lightning using a special camera running at 7,000 frames per second. Played back at 700 frames per second, the results are mesmerizing. Watch in full-screen mode for best results.
I'd love to see different types of lightning filmed like that - not just forked or chain lightning, but sheet and ball as well. It gives a whole new perspective on the subject.