MOTs typically put out anywhere from 1-2kV and anywhere from 500mA-1500mA of current. They look just like big amplifier transformers too... the only clue to the untrained eye that they are step up is the silicone insulation on the output and the "DANGER HIGH VOLTAGE" sticker on them.... which usually falls off after many years in a microwave.
Heck, I treat neon transformers as lethal. We have one for a that delivers 9kV at 30mA.... the threshold of cardiac problems is accepted to be 100mA in "normal" people, but 30mA could cause death if the wrong circumstances are lined up.
Things that could go wrong with you:
Bad day (dehydration, off balance electrolytes)
Unforseen nerve problems
Unforseen heart problems (arrhythmias, etc)
In any case, 30mA would be terribly painful. My dad worked with neon and he can vouch for this! Lets say you got zapped from the tip of you finger to the middle of your finger, a casual contact zap.... that's a nice chunk of of energy in a little area. The burn would be nasty.
9kV makes a nice Jacob's Ladder but we are smart enough to unplug the dang thing when we need to adjust the gap width! We also are aware of the fact that the output is not isolated... 4.5kV with respect to ground on either output terminal!
A fly landed on that Jacob's Ladder.... we plugged it in just in time too! It makes a WONDERFUL bug zapper. Fly + 9kV = BANG! 270W into a fly vaporizes it pretty quickly.
