I've seen that happen many times! I once had a call where someone fell down the shaft from the 7th floor and could I go by and help them get him out of the elevators shaft. It turned out that a maid got her extension cord and vacuum cleaner part in and out of the elevator. The vacuum was in and the elevator took off to the next higher floor before it shut down. So along comes the maintenance man and opens up the hoistway door on the floor where the extension cord was and trips over it and down the hoistway he goes! So I was right around the counter and when I got there, there was nobody in the pit. He had gotten out by himself and went to the hospital without telling anybody. He had bounced off of what we called the spreader beams and the extension cord that was wrapped around him broke his fall as he was bouncing off those spreader beams. I never got to meet the guy to question him about what happened but saved our company from a lawsuit by taking photos and talking to the maid and getting her to sign an affidavit as to what she saw happen!