I bought one of these wireless thermometers for my husband for Christmas - it has an outside sensor to let you know what the temperature is at any given moment inside and outside (well, at least wherever the sensors are). My husband recently put the outdoor sensor in my studio to ensure it stays above 50 degrees in there. (It has to stay at least 50 degrees so that the sheetrock mud dries right). I was cleaning up the odds and ends the other night and I put it in the trash. I just thought it was our old sensor (never mind the faint sense of confusion as to why the broken one would have been there in the first place). The revelation did not come to me until later when my husband mentioned the studio temperature as he was looking at the display. I fessed up that the sensor was in the trash. We'll take it out before trash day, but it makes for a few laughs until then.
And yes, it's 53 degrees in the trashcan.