DH and I took DS with us to a Boot sale when he was 3yo, (he's 9 now).
Ds wanted to go on the roundabout ride, left DH looking at a stall, and took DS to ride, sat him on Thomas, paid lady, and stood watching.
Then I heard people shouting 'push the stop button' noticed they were shouting because a steel cable that was used in towing the ride had got caught and was being taken around with the ride, as it got further round it moved upwards becasue it was getting tight, cable was now at head height of all children on ride, several children had managed to duck it or it had caught them on face etc.
My DS was still sitting in Thomas heading for cable - I ran towards him tried to grab him off ride whilst it was still moving but missed him - ran screaming after him (wet myself in process - no kidding) cable came up to his neck and rolled up his neck and over his face. I really thought it was going to decapitate him.
Some one finally pushed the emergency stop and I just grabbed him and sobbed and sobbed, I collapsed with him in my arms - DH had heard me scream and came running and I was trying to explain what had happened but was on verge of fainting.
Ds Had blood on his neck and was just hysterical.
Officials starting appearing from every where - police and ambulances were called.
My DS and I and several other parents and children were taken to hospital. DS suffered superficial injuries and was fine.
Old lady operating the ride was investigated - turns out she lived in a residential home and comes out to stay with her brother at weekends - who brings her to Boot sale to operate ride whilst he runs another stall!.
He had no insurance and they were kicked off site for good. Health and Safety confiscated the ride as it was faulty.
I have never never been so terrified in my life - I really thought he was going to die. I wouldn't let him on a ride for years, not that he wanted to go on - he would see the rides and start screaming, he finally wanted to go on a ride at 6yo, and I let him provided he went in a vehicle with a roof on!
I felt I shouldn't have let him go on the ride - I should have thought old lady would not cope in an emergency, I felt guilty and upset at what could have happened for a long time.