I was playing Spirit Tracks a few days ago, and, while in the spirit tower on level 10, I told zelda to put the big key in the lock. She goes to do that and at the same time she was going to throw it in, she got hit by the floormaster, resulting in the key getting stuck to her head. She can't pick it back up or get it off by my weapons or the hands so I had to turn off and redo the section. Still not sure how it got stuck there.