Wired Science posted the best science visualization videos of 2009 as selected by The Department of Energy at the Scientific Discovery through Advanced Computing conference (SciDAC) in June. Sit back, drop some acid, and enjoy.
My favorites are:
1. The Big One (Southern California earthquake simulation)
2. Making Waves (Water movement around a ship)
3. Supernova (Thermonuclear runaway in a white dwarf star in a binary system)