I bumped my knee against some guard railing; hurt for a few minutes.
I was cleaning out the garage, and though I knew it was there, I kept hitting my knee on a metal dolly that was near the door way. It was even the last thing I folded up and put away, though it probably should have been the first thing I took care of. Would have saved my knees a few bruises.
Clearly there is some conspiracy going on here.