this looks to me like a guy who: A. doesn't want a call, but might not hate one either; or B. a guy who figures he might have the best hand and doesn't figure he can get away from it considering the size of the pot and your smallish amount left, and he probably figures he's gonna have to put it all in anyway. I think a set of queens would have bet out half of Hero's stack or checked here. I think you have to call. I think you're up against A-Q or A-K with the draw.