Unfortunate Incident

So I was on a break from "weekend school" learning about the environment, and decide to go to the washroom. Both of the urinals are in use so I go to a stall and shut the door behind me, but did not lock it. I get done what I have to do, and try to open the door, but it won't open. I try to unlock it to no avail. I hit the door trying to knock something loose, but that again fails. So I decide that I won't be able to get out the door and the real quandry begins, do I go under or over. I decide that the floor probably isn't that clean so I have to climb over. I wait for everyone to leave and then stand on the toilet and boost myself over the stall. Sometime between jumping up and landing on the otherside I managed to hit my head, which really hurt. I was hoping that someone would come in because I would laugh at me if I could.