StuKeith, how did you manage to get a shock? I've plugged in leads to PSU's before with the power on and all it does is make a crackle sound??
I'm truly shocked (if you'll mind the pun) that you lot have been cooking yourselves! I've never been shocked badly, but I'm totally paranoid about such stuff as I wouldn't want any small current going across my heart! Perhaps I'm a wuss, I feel so left out.
I have been shocked by this game though and it hurts bad! It's such a laugh, especially while you're drinking a few beers in your local pub! LOL!
http://uk.youtube.com/watch?v=1D_A20aKzaQ
http://uk.youtube.com/watch?v=ohBlp_uL6KU
and as you can imagine, people find ways of using it for other activities:
http://uk.youtube.com/watch?v=q0OcKCSPhlw