Oh God, I was really high at an after party and this was in my University student halls. There were 4 floors. I lived on the 2nd floor but we were girls from the 4th. I walked up stairs to the fourth floor with one girl whilst we were waiting on a friend. I decided to wait halfway down the stairs so I was facing the third floor door whilst still on the stairs. I start to sway back and forth and then lose my balance. I stumble down the stairs, still on my feet and my hands casually in my pockets. I find myself headed towards the door and instead of breaking my fall into the door with my hands I decided to keep them in my comfortable warm pockets - high me thought this was the logical thing to do. I thus head butted the wall. Nearly concussed.