The stun-gun, yes.
I was in a friends dorm, back to the doorway. His roommate, who was a complete dick, had one and walked up behind me, and stuck it in my back. That one didn't do much, so I let him hit me in my lower right chest - he wanted to do it over my heart. I told him I would tell him when to stop. He zapped me and I couldn't talk, move, anything.
He just kept going and going. That was the last time I have been hit by one of those.