Wow! I guess I should be dead now since I licked both of my hands and grabbed the + and - terminals of my 875 Amp 12v car battery, oh wait its DC just like the PSU pins.

I double dog dare you to lick the two DC wires of a telephone cord. Post to youtube.
I was going to dare him to lick the car battery properly *, none of this "I licked my hands and touched it" crap but I don't want to be responsible for the results
* notwithstanding you'd need a very long tongue and would actually need to attach wires first.
The car battery really wouldn't be that much worse than a 9V battery. You could try it on a 12V power tool battery or a lantern battery, with the added benefit of not needing to stack three of Gene Simmons' tongues end to end.