I was coming round a bend about a day after it had rained, turns out there was a pothole under a tree that still had water in it. I clipped the water and the back end of my car started to slide out but I fishtailed for a bit till I regained control of the car without ever touching the grass on either side of the road. I’m really lucky there wasn’t any oncoming traffic because one of my neighbours died in a similar situation a year later.