It's a cheap, dirty trick, but then there are no rules in real combat and Thor would be hobbling himself if he trained otherwise. He goes down hard, unable to repeat the same trick to flip Aslan as he did at the first of the fight, ending up tackled onto his side and pinned down by several hundred pounds of divine Lion.

Thor manages to get an arm up to guard his throat, and throws a pointed strike at the soft spot of Aslan's chin, unprotected by his mane. If he's going to be up close and personal, that just means the Lion's vital spots are in better reach, or so he hopes.