Exciting prospect Un De Sceaux came unstuck on his fencing debut when falling at the third-last with the beginners chase his for the taking at Thurles.
The Willie Mullins-trained 1/8 shot had his 15 rivals strung out and was going great guns in front when he appeared to crumple on landing and parted company with Ruby Walsh.
His demise left Jessica Harrington's Mr Fiftyone (8/1) to pick up the pieces in the hands of Robbie Power and score by five and a half lengths from 66/1 outsider Smokey Joe Joe.
Mullins reported Un De Sceaux to be none the worse for his fall, apart from a small cut.
"He came out of it well and is grand apart from one little cut which any horse can get," he said.
"I was very happy with him prior to the fall and it was just one of those things and it was a novicey mistake. I just hope he won't make a habit of it."
The Mullins team still got a double on the board through Max Dynamite and Clondaw Court, both owned by Rich Ricci.
Clondaw Court made all to take the Rock Of Cashel Hurdle in good style to justify his 1/2 price.
Allowed to dictate matters, Walsh did not have to get serious as the pair cruised home by four lengths from Mireya.
Former smart Flat performer Max Dynamite (5/4 favourite) made a winning jumps debut in the Cahir Maiden Hurdle.
Eighth in last year's French Derby, this €200,000 purchase led between the final two flights, and jumped the last well to score easily by six and a half lengths from Phil's Magic.
Former smart bumper performer Golantilla (4/7 favourite) made hard work of beating Ryansbrook by a half-length in the Holycross Maiden Hurdle under Adrian Heskin.