Standing at the edge of the lake, a man saw a woman flailing about in the deep water. Unable to swim, the man screamed for help. A fisherman ran up. The man screamed, "My wife is drowning and I can't swim, please, save her! I'll give you a hundred quid!"

The fisherman dove into the water. In ten powerful strokes he reached the woman, put his arm around her, and swam back to shore. Dumping her at the feet of the man, the fisherman said, "There you go, where's my hundred pounds?"

The man said, "Look, when I saw her going down under I thought it was my wife. But this is my mother-in-law." The fisherman reached into his pocket and said, "How much do I owe you?"

The victim thought it was his wife but it came out it was his mother-in-law so the fisherman felt so bad and decided to pay the victim instead.