Bryony Frost secured her place in the record books as she became the first woman to ride a Grade One winner at the Cheltenham Festival with victory in the Ryanair Chase.
Partnering 9-2 shot Frodon for trainer Paul Nicholls, Frost was in the front rank throughout in the two-mile-five-furlong contest and the duo were marginally ahead of Aso jumping the last.
Aso appeared to just edge in front after the final fence - but Frodon would not lie down and he responded to Frost's every urging to pull a length and a quarter clear at the line.
Aso (33-1) kept on for second, with Road To Respect claiming third.
Frost said: "My god, he jumps and just at that minute when he got overtaken, most horses would quit, but he grabbed me by the hands and said, 'don't you dare give up, don't you dare not send me into the last - I want this more than you, now come on, where are you'.
"Just look at what he's done there - deny that he just loves racing. He's unbelievable.
"He just made the dream come true, it's just incredible. He will deserve every single high five, pat and carrot."