Whether it be misplaced items or things that just slip out of our pockets, what was the worst thing you lost when you were out and about? Loosing things on the bus is a pretty common one, but it could also be at a park or someone's house or something. I remember one of my friends lost either a game boy advance or DS game while on the bus back then. The biggest thing I left behind was a phone in the school library [slipped out of pocket] but I did get it back a day or so later so at least that ended fine.