The absolute WORST time and place to have a heart attack...Tiny Tim did it!
He was down for five minutes, "dead center" (sorry!) on a brightly lit stage during his own solo show, before anybody actually got up and checked him, at which time it was already quite too late.
Moral of the story: Make it clear to your audience that you don't do heart attack gags, so if you appear to be doing one, treat it as real.
I have spent time with an ambulance service (one year) as an assistant only, not an EMT or paramedic, but if I were confronted with a patient in flat line or showing a rapid, random squiggle, (v-tach) on a monitor and had access to a defibrillator and there was no better qualified person in the area to help, I'd throw the law to the wind and hit him with 200 joules to start. You bet I'd violate the law to save some poor sucker's life! What good citizen wouldn't at least try?
I heard a not-quite-confirmed report that once, one of the para's I knew took the paddles and lit up another sleeping para's ass with a minimum shock just for the hell of it. No harm done except for the fist fight that broke out immediately afterwards!
CJ