What was the dumbest way you ever injured yourself?

Was staying in a hotel on a work trip. We arrived late, tired, busy day ahead. The bed was made up with the sheets all stupidly tight and I didn't yank them off as normal but got in and fell asleep. I never sleep well the first night in a new place, I obviously turned over in the night and my foot was pinned by the sheet.

Was a fun few days trying to coordinate a conference while unable to walk.