Sweeney Tunes capitalised on a terrible mistake three out by 4-7 favourite Mikael D'Haguenet to lift the Woodlands Park 100 Club Nas Na Riogh Novice Chase at Naas.
The Willie Mullins-trained Mikael D'Haguenet looked to be going ominously well when his blunder took him from first to last in the Grade Two contest.
Davy Russell needed no further prompting on the Paul Nolan-trained Sweeney Tunes (3-1) and set sail for home, holding the challenge of Charlie's Vic, who came from the rear of the field, by three and a half lengths.
Mikael D'Haguenet, who had been completely stopped in his tracks, remarkably rallied to get third.
Nolan said: "It's nice to win these Grade Two races, but at the end of the day Mikael D'Haguenet looked like he would have sluiced in.
"He's entered in the Pulteney Land Investments Novices' Handicap Chase at Cheltenham, but he was given a mark over 140 so he's not eligible for that.
"He's in some of the open handicaps at Cheltenham, but running this close to the Festival is not ideal so we might look at the Irish National instead."
Russell doubled up when bossing the Paddy Power Mobile App Handicap Hurdle from the front on Tim Doyle's well-backed Mallowney (11-4), who cleared right away in the straight to score by seven lengths.
"He ran very well in the Boylesports Hurdle (at Leopardstown last month) and only for a mistake at the last he would have been placed," said Doyle.
"We won't be too hard on him this season and I'm really looking forward to going chasing with him in the autumn. He should make a smashing chaser. He's got a lovely pedigree and is from the same family as Boston Bob. He's only really started to mature into a good horse recently."
20 October 2014No rushing back for Long Run
Dynaste leads Old Roan contenders
Grands Crus retired
Chelmsford City handed 58 fixtures
Exciting Berlais heads to Chepstow
Force handed Hong Kong mission
Park favourite for Trophy hunt
Al Kazeem team eye Hong Kong trip
Alderwood to take two-mile test
Dynaste leads Old Roan contenders
Commemorative bound for Breeders'
Hennessy aim for Clouds
Slade eyeing victorious swansong
Fiesolana on Breeders' trail
High-class possibilities for Trophy
Chelmsford City handed 57 fixtures
French option for Maarek
Billy back for chasing bow
Judge to bid for Breeders' glory
Pipe mulls Moon target
High hopes for Holywell
Judge in Breeders' frame
Hill stars for Stoute and Moore
Gabriel lifts Garnet for Deegan
New One back with a win
Light career hangs in balance
Stars shines on hurdling debut
King big guns ready to start
Tullius camp consider options
Doyle unlikely to appeal Ascot ban
Mullins prepares formidable team
19 October 2014New One breezes to victory
Lavelle has Becher plan for Lodge
Riches heading on road north
Down Royal plan for Tiger
New makes Kempton return
Panther hunting Canadian prize
Sun takes a shine to Cork
Hobbs upholds Showcase record
Another gold strike for Bronze
Gallant Noble a true Champion
Head turns on Charm in QEII
Madame is Ascot leading lady
Forgotten rules for Weld
Byron is poetry in motion
18 October 2014Forgotten rules for Weld
War misses Breeders' date
Rakti reaps Caulfield reward
Chatez bids for Balmoral crown
Lavelle duo top Cheltenham card
Integral takes on the boys
Noble on Champion mission
Belardo a Dewhurst sparkler
Together stands firm for Ballydoyle
Ivawood felled by plucky Thought
Crowley doubles up on Berkshire
Tendon injury sidelines Tent
17 October 2014Minstrel calls the tune
Sceaux set for chase campaign
Sari seeking Ascot gold
Charm out to show winning Spirit
Estimate aiming to go the Distance
French veteran back for more
O'Meara - G has the Force
Fallon considers American switch
Cossack maintains Elliott's record
Vautour goes chasing
Lucida heads Godolphin trio
McCoy sits out weekend action
No Middle ground for classy Ivawood
Big guns hold sway for QEII
Cirrus stands firm for Champion
Hanagan: Estidhkaar no soft touch