My first was quick and my second was quicker. But not as quick as yours and I didn't lost a lot of blood so I'm not sure that it's quite the same. And I haven't had another one since then.

TBH it's hard to imagine a labour being quicker than 50 mins but I guess it happens. The manager of the child care centre DS1 used to go to had her third baby in the car on the way to hossy. One of her previous labours had been quick, the other was a c/s. The third one was just 10 ctx in total and no pain. She was sitting in the car and felt something in her tracksuit pants - it was the baby's head!