Most labouring women will develop a way of coping with each contraction and put that technique into practice as the pain builds intensity but this young woman appeared to be surprised by it every time and would frequently fall backwards or launch herself off the bed to be caught by her mother every time.
At one point my client seemed to be safely and quietly resting on the bed and her mum went to do something else. A pain came and the missile launch thing happened again. Fortunately I was close by. My attempt at catching her was successful if not graceful. At that moment there were two of us making an almighty effort so nobody can be quite sure who it was that "let one slip"!