Back when the iPhone first came out, one of my friends got one. One day we ended up going out fishing on a boat with another guy and we all left our phones on the dock so they wouldn't get wet, and I signalled to my wife to pick them up. Apparently she didn't understand my hand gestures or whatever and left them there, and they disappeared. For the two junky flip phones there was a happy ending - someone dropped them in the window of a park ranger's truck - but the iPhone was never seen again.