MONBEG Dude benefited from a brilliant Paul Carberry ride to prevent Teaforthree and Tony McCoy giving the home crowd a Welsh-trained winner in the Coral Welsh National at Chepstow.
Dropped out stone last for much of the marathon contest, Carberry began making stealthy headway on the second circuit.
In contrast favourite Teaforthree was up with the pace throughout but looked booked for third turning in as Triggerman and Giles Cross still appeared to be going well.
However, they had been racing from some way out and unfortunately Giles Cross went wrong and was pulled up.
Carberry still head some 10 lengths to find three out but did not panic and joined McCoy at the last and the pair tussled to the line, with Monbeg Dude (10-1) winning by half a length for fledgling trainer Michael Scudamore, who is only based some 40 minutes away from the Monmouthshire track.
Triggerman stuck on for third with Arbor Supreme fourth.