At 16 or so, I was sitting in my room; mom comes and knocks on the door, which was always locked, of course. Before I could even react shes knocking over and over and raising her voice "open the door, open this door!" The dog runs up and starts barking. Pounding on the door now, she screams "open this fucking door!" I'm still saying nothing and not opening the door. She walks off to get a screwdriver to undo the lock - it was one of those simple door locks that had a pin you could push to open. I went to the door to hold the lock shut. Shes trying her hardest to push, but I'm able to keep it locked. She walks off muttering some swears, and I sit back down. Suddenly, a loud click noise: the lock unlocks itself. I rush to re-lock it but mom was faster and she bursts in, decks me in the face, then just turns and leaves.