I had a friend (we are both military families) that when she bought her shock collars she made everyone of her family members put it on their neck to see what it felt like for the dog. Sorry if this is a little off your point, just reminded me when you said you tried it on your hand. I have no experience with them but I haven't had to either thankfully.
Hail Gunther 7-2-2013
If at first you don't succeed, destroy all evidence that you ever tried.