Egg in the bath!

When we got home today I was baffled to find an egg in the chicken's dust bath (the large flower pot containing dirt that they have in their run). As I bent down to retrieve it I could hear a sort of whirring sound and to my horror, noticed that the cord/line for the auto door had snapped (later to discover that in fact the knot had come undone). This must have happened some time after the first chicken had laid her egg (probably Leia as she usually lays the first of the day) and the time the second chicken wanted to lay their egg. The second chicken must have been unable to get into the coop as the door was shut. I picture them hobbling around the run with their legs crossed until the forced indignity of laying an egg in the dust bath! Oh dear. Alan has had a go at fixing the auto door.