and I seem to recall a haunt that used one on a switch. when the people entered the library the switch was activated and fishing line was attached to books mking them fly off the shelves and spin around over head. Nice effect from what I read, but you do have to reset them each time.
i used a fan motor to make a hang man(fan motor in a bucket) but i needed to put dimmer switch on it . it work all wright but not what i wanted
next im goin to use the same system for a electric chair prop,flip the switch and watch him shake.