Yeah, my speakers were at max, lucky my parents didn't hear it or I would have been dubble owned.
I've seen that before, on Americas Funniest Home Videos. It was funny watching other people getting scared by it, not so amusing when its done to myself however.
Maybe just add a tag on your sig that says, Warning: turn down your sound before clicking, or somthing like that. Because I'm sure there will be many complaints after me. Anyway, you're forgiven