The tumble dryers in my halls of residence were meant to take 20p (oh, those were the days, it's probably a quid now), but if you put in a 1p slowly and kept tu

The tumble dryers in my halls of residence were meant to take 20p (oh, those were the days, it's probably a quid now), but if you put in a 1p slowly and kept turning the handle it would trick it.