"Foinavon Wins Grand National after Huge Pile Up Causes Race Shambles (1967). The 1967 Grand National was the scene of one the most notorious pile ups in Grand National history. Foinavon had odds of 100/1 to win the race. Even his owner Cyril Watkins did not bother to attend Aintree because the chances of a win were wholly improbable. As expected, Foinavon did not play a competitive part in the race until at the 23rd fence, a loose horse cut across the riders causing all the horses to either fall, unseat their riders or refuse to jump. Foinavon and his rider, John Buckingham, are so far behind that they manage to bypass the shambles, jump the fence and take a lead of 200 yards. Although most riders were able to remount, no one managed to quite catch up with horse and rider. Sadly no owner or trainer were in the winners enclosure to congratulate them!"
This plays out like a movie! CRAZY! And I imagine the look on the owner and trainer's faces when they got a call saying "By the way, your horse won the Grand National".