During my PPL days at Biggin Hill there was a report of a Cessna 337 twin (engine front and rear) whereby a passenger disembarked, walked around the back of the a/c and into the still rotating prop with tragic consequences.
I believe that may have been at Liverpool in the early to mid 1970,s. A stewardess having accepted a lift disembarked the 337 whilst the a/c was being shut down and walked rearward through the prop arc. Resulted in a big tightening of security around the Liverpool apron at the time.