Oh, I'm sorry guys. I just thought you guys wouldn't get upset at this. Please forgive me, I like scaring people with flashes like these. I can't help it. They are called "screamers".There's a page on wikipedia devoted to them with many links to screamers.
http://en.wikipedia.org/wiki/Screamer_%28Shock%29 I tried to warn by saying "please don't hate me for this one", but I didn't want to give it away. I'm really sorry guys.
Wait, why am I sorry? i succesfully pulled off a shock! But sorry for your scare, Dipstikk. I too, am a sucker for these.