Wiesentraum stunned punters with a shock 40-1 success in the 'In Loving Memory of Scott Dobson' Beginners' Chase at Doncaster.
Victory looked out of the question for most of the race as Lucy Wadham's six-year-old was struggling at the rear of the field on his debut over fences.
However, he picked up noticeably for Dominic Elsworth in the long straight and collared Vintage Star close home to prevail by a neck.
Wadham's husband and assistant Justin said: "He's a good ground horse, which is why we came here, and I think he wants further. His jumping got better as the race went on and he will improve for better ground.
"This was surprising, so we'll stick to novice chasing, but it depends on the ground. He's a good-actioned horse."
Connections have Cheltenham Festival aspirations after Rocky Creek opened his account over fences in the Healthwatch Doncaster Novices' Chase. Runner-up to Harry Topper at his first try at the bigger obstacles, the Paul Nicholls-trained gelding beat a small but select field in good style.
Daryl Jacob always had the 4-6 shot up with the pace and though Molotov tried to make a race of it, Rocky Creek was too strong and strode away to win by four lengths, with Attaglance 15 lengths away in third.
"The form of the Exeter race has worked out well with the winner winning a Grade Two chase at Newbury," said Nicholls' pupil assistant Tom Jonason.
"It's not been straightforward between Exeter and here, but hopefully he will turn into a Festival horse in March. Between now and then he's got time to have two more runs. There were a couple of good benchmarks in there."
Stan James cut Rocky Creek to 14-1 from 20-1 for the RSA Chase at Cheltenham.
21 April 2014Clowance up for the Cup
Garner hit with lengthy ban
Memories in Final flourish
Fitz powers home at Fairyhouse
Toner hits target for Elliott
Joe ready for Cork outing
Lennon looking to call tune
Ground holds key to Tonto show
Lucky escape for Cook
Mind called up for National service
20 April 2014Fitz powers home at Fairyhouse
Lyons backs Brackan
Brookhouse turns to Crawford
Weld and Smullen keep up good work
Whiskey shows winning spirit
Brook another for Russell team
Zurigha blossoms in Snowdrop
Planning pounces at Haydock
Escalating moving on up
Buntline bidding for more
Rebel all set for big Powers test
19 April 2014Bolger on mark with double
Elliott calling on Toner
Fry taking Bold route at Haydock
Snowdrop test for Ribbons
Classic redemption for Grandeur
Hanagan the star man for Fahey
Doyle pounces with classy Cat
Litigant goes Marathon distance
Guineas hope Ertijaal delivers
Life's good for Kirby and McEntee
Moss ready to roll for Brown
Tigers on the prowl for Teal
18 April 2014'Legend' Border just denied
Hanagan the star man for Fahey
Hardie makes history on View
Ready to undergo heart scan
Cantlow tops Irish National weights
Arvika career in balance
Bally stars in Powers quartet
Royal target for classy Cappella
Obliterator future excites Lyons
Chasing plan for As I Am
Killough does it again in Sefton
Toormore claims Craven
Hamza holds on in Abernant
Wonder-ful double for Godolphin
Grugy all set for Sandown defence
Vaughan hoping for Bay of plenty
Muir keen to make a Point in Sprint
Newmarket will suit Canarias - Leon