Came down to the 18th hole. And then this happened.

I can remember in the Open at Royal Lytham about 20 years ago, Ian Woosnam was in with a chance of winning only to discover that in the final round, he had too many clubs in his bag. That cost him a 2-shot penalty. He was very upset and finished down the field. He forgave his caddy but then not too long afterwards, the same caddy didn't turn up when Woosie was playing the Volvo Masters in Sweden. Woosie sacked him.