Josh Moore stole the riding honours at Lingfield with the first four-timer of his career at odds of 228-1.
His opening three winners – Benevolentdictator (13-2), Deebaj (10-11 favourite) and High Up In The Air (7-1) – were for his father, West Sussex trainer Gary.
Moore’s fourth came on Annual Invictus (evens favourite) in a two-mile novice hurdle.
Leading before two out, Chris Gordon’s charge kept on stoutly to score by six lengths and cap the jockey’s red-letter day.
“I thought he was getting tired, so I went to pop the last and he fell out of my hands,” Moore told Sky Sports Racing.
“The race was in the bag and it felt like he was just on his head a little bit down to it, so I went to pop and he had more left I expected.
“It’s a great feeling to have four winners – it will never happen again, will it!”