Recently: Prince of persia: Sands of time.
The first battle scene when you learn how to use the dagger. PHOAR! Reversing time and sucking sand monsters into the dagger. Crazy stuff
One of the original and best "holy shit" times: When i got zerg rushed for the first time at my first lan party. Up until then me and my friend always used to play terran over modem. At the lan we went teams against these other two guys who went zerg. They decided to amass nothing but the full unit limit of zerglings. Man looked absolutly fucking crazy, no chance for the newbie human players
