Re: Don't forget mischief
This happened in one my the physics lessons I attended as a pupil at a 'best-of-the-best' type educational establishment in the UK (tells you something about the quality of the attendees (and the professors) at such establishments tbh)
Physics prof got the lab techs to wire up a very large electrolytic cap to a mains powered adjustable supply, the output of the supply rather low, so the cap took some time to 'charge'.
He then deliberately parked this booby trap on it's trolley near to each class's known troublemakers to see who couldn't resist the urge to flip the mains switch.....
Happened in my class and scared the crap out of all of us when it went off 4 feet from the victim. (served him right tbh, a right see-you...)
As it happened it inspired me to run my 1st year A-level project as an investigation into the behavioural characteristics of electrolytic caps... the lab had a "very" expensive signal analyser which I took full use of and had great fun blowing up several different caps. The signals generated are very odd when they get near to blowing.