1. I'm thinking that Thor doesn't want to fight
2. Hulk is reacting like how a normal person would react if hit by another person, as in they're equals
3. If Thor makes this look too good without Mjölnir then the rivalry is officially over
...when Thor gets hit by the Hulk, he goes flying like a rag doll (in the official trailer, and in Avengers movie), but when Thor hits him (without mjolnir), it barely register as an annoyance to the Hulk (this tv spot trailer and Avengers movie). There is no more rivalry as far as the casual moviegoers are concerned. The only ones trying to argue for Thor in the rivalry are the Thor fans (of which I am one of them). If you listen to casual moviegoers, there is no doubt in their minds that Hulk is leagues stronger than Thor. There are even casual moviegoers thinking that Wonder Woman is stronger than Thor. Before Thor was being compared to Superman, now, Wonder Woman is perceived as even stronger than him. I know we Thor fans know "better", but no thanks to Marvel and how they choose to portray Thor now.