I tried all the usual methods of getting through the door as well as rolling, walking backwards, standing to attention (still possible with a broken leg) then crouching. Clearly I can get through the door either crouched or walking.
I had no other way of killing myself (rotten fruit, disinfectant, etc) and no other players were within range. My only resolution was, after 20 minutes of my "incarceration", to drop onto a TS server and plead for someone to come and cure (or kill, and it was the latter that was the solution used) me.