On holiday, at a large theme park, queue for a rolller coaster. Rule is the you must leave everything in lockers at entrance to ride including sunglasses, mobiles, cash etc. There is no explanation for this rule but given that the coaster turns you upside down more then once I'd assume it is to prevent items being thrown out and being either broken, or causing serious harm to people in the ground. You have to pass through metal detector door to access ride.
Group of three teens ahead of us. One teen decides she can't be separated from her mobile so slips it in her shoe. Woman behind me sees her do this. Teen passes through door, door beeps, they "wand" her body but not feet and are about to wave her through when woman pipes up that she has a phone in her shoe. Stand up row ensues between teen who tells woman to mind her own, and woman who tells teen off for being irresponsible and thinking rules don't apply to her. Security chucks teen off ride. Lots of muttering in line about keeping out of things which don't concern you.