Of course he came down too far out to be confident but your mention of Shotgun Paddy merely backs up my opinion.
Black Thunder is officially 7lbs better than Shotgun Paddy. I actually believe he's another three or four pounds better than that. But he was carrying the same weight yesterday after the claimer's allowance. Nicholls, presumably a better judge of jockey than I am, went on record as stating that the claim was so valuable he'd be cherrypicking rides for him to maximise its value.
7lbs is about 14 lengths in yesterday's conditions.
14 lengths in front of Shotgun Paddy would be a neck in front of Mountainous. For every pound better than that he actually is, add another two lengths to the margin of victory.
Obviously it is far from as simple as that - credit me with some sense - but watch the race again. Black Thunder stays with Mountainous from the home turn, gets ahead of him and stays there to the line. But his ears were pricked and flicking the whole way. He was not stressing.
OK, obviously he didn't have a jockey on his back and that's why we'll never know.
In a similar vein, one I'll be watching for in future is Allez Vic. Having unseated at the second while still in rear, he gradually closed up on the main group for the rest of the circuit, stole ground round the inside going back out into the country and fairly scooted past the leaders on the outside rounding the home turn. He came wide out of shot up the hurdles course so I don't know where he finished but the last time I saw a horse do something like that it was Yes Tom in the big race at Doncaster (won by If In Doubt, if memory serves) and he came out and hacked up next time.