I think this fits the criteria - while out collecting coffee husks from the coffee roaster that would be used on the school veggie patch as mulch, I popped in to find a couple of nearby hides. While at Contain Your Excitement (GC5GVJG) it occurred to me that these husks would need to go back to school and be placed in the gardening shed, for which I had the key this week. I patted myself down looking for the key post log signing (as I often do to check that I've place my pen back in my pocket), I realised I didn't have it. Losing a house key is your own problem, losing a key that belongs to school is a bigger problem. I get back to school that morning and try to retrace my steps just in case it was there. Nothing. I admitted defeat and stored the bags of husks at home. I didn't even have a good excuse to come up with for how I lost the thing (I don't think I'd be in anyone's good books if I said I may have lost it while caching). Move forward to Saturday and to my surprise, there it was hanging on the fridge!! Who keeps a key pinned to a fridge door? No wonder I couldn't find it. Thankfully I won't have to come up with a dodgy excuse come Monday.