THEY came in their droves to Thurles on Thursday to see one horse in particular, the unbeaten Willie Mullins-trained Un De Sceaux make his eagerly-awaited chasing debut in the Killinan Beginners Chase. Everything was going according to plan for the 1/8 favourite until he crumpled on landing at the third last fence, leaving Mr Fiftyone to come home the five and a half length winner in the hands of Robbie Power.