Well this video brought back some funny memories. Next time don't block doorways or other paths, doing that you will become "unprotected" which means other players can hit you but you can't hit them. Since the Hub is the only no-PvP guarded town players couldn't hit you for any damage but then you hit one "protected" player and the guards shot you. This tactic is especially useful for trolling in other protected towns like NCR where you can kill a player who for example is blocking the entrance to a brahmin pen. To check who is "protected" you must stand right next to another player and Alt-click on him and select push. If he bounces away or the text This one isn't blocking anything yet. appears you are free to attack him or push him some more with the same method.