I had never given an elevator a thought. i am glad you posted that alert.
lawn mowers............. next time I am passing by someone mowing the lawn...i pick them up. too many times stones have been thrown our way and with my dogs being lower to the ground they are more likely to get stoned.
there is a lot of yard men working on several lawns some days and there will be several of them working on one lawn. they use a weed eater to edge and that has thrown some stones too.
good topic, by the way!