In reply to jonnie3430:
I was quite surprised that she penduled as far as she did, it didn't seem consistent with where the belayer's end of the rope was leading. I can only assume that if the top-rope was
in-situ, it has been directed through intermediate clips to reduce swing potential.
In the normal run of things, a climber on top-rope would unclip these as they ascended, then swing in and re-clip these on the way down. However, if the climber ties onto what should be the belayer's end, which is running straight up to the lower-off, problems arise. This appears to have been what has happened.
This used to happen periodically on a couple of steep top-rope routes at the wall I used to work at. We realised that we couldn't just assume that all climbers would figure out which end to climb on, so attached a big laminated card to the belayer's end, telling them to tie onto the other end and making it impossible to use for a knot.
Of course it may have been a lead-rope that was partially unclipped from the draws - either way she was still on the wrong end. Hope it didn't hurt too much...