Probably when I was heavily into Deus Ex. I played that game to death. Anyway, I was walking down a corridor at school in the science wing. Now, we had these digital timers that make this "beep" sound and a class was using these very timers. Now the "beep" sound is very similar to the "beep" sound the explosives (LAMs in Deus Ex) make just before exploding. Upon hearing this particular "beep" noise I immediately assumed an explosive was about to go off to my left and dived into the photocopy room to my right and hid round the corner... That's when I realised there was no explosion and I was in the real world...













