Your Busy landed a famous National double by adding the Guinness Kerry National at Listowel to his Killarney National success in May.
James Nash's reserve got in at the 11th hour following the defection of Golden Wonder and he took full advantage under an inspired Katie Walsh.
A reserve has now won the Listowel feature for the second year running following White Star Line's success 12 months ago and the 25-1 chance came up well for Walsh at the last, before holding Pass The Hat by half a length under a power-packed ride.
The well-supported Shanpallas lost little in defeat finishing a creditable third under Davy Russell and the same can be said about Alderwood, who was a running-on fourth under top weight in the hands of Tony McCoy.
Walsh, the first female jockey to win the Kerry National, said: "It's just unbelievable. I was headed for a stride or two turning in but he winged the second-last and winged the last. He was pulling out for me the whole time.
"He loves it in front. He completely missed the first and it was some performance after that to do what he did in a competitive race like the Kerry National. He was just really on-song today."
Nash, who is dreaming about a trip back to Aintree for the Crabbie's Grand National, having run in the Topham last year, said: "Katie got a brilliant tune out of him. I didn't think he was quite fit enough at Killarney but it proved to be a good prep run. Thank God he got into the race as he was flying at home.
"Even though he's 11 he doesn't have that much mileage on the clock. He's still very keen and enjoys it. He probably got an easy lead and was able to stay in his comfort zone.
"We'll go home and see if we can get into the Munster National but that will depend on the horse.
"I'd love to go back to Liverpool for a crack at the big one."
Horse racing fans have been lauding Katie Walsh for her ride on Your Busy on social media. Here is the pick of the reaction:
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