Whistling....wow, I can do that too.
Yep, it wasn't clear. Surtur tossing Hulk away didn't have any noticeable lasting effect and the Hulk was ready to go again.
The Hulk twice got up from godblasts. He was ready to go again against Thor and was balling his fist up for the next exchange. That moment was robbed by the Grandmaster but yes the fight looked like to continue.
Thor clearly had taken the advantage at that moment the fight stopped but it had already shifted between the two already.
Exactly, when the Grandmaster zapped Thor, Hulk leaped on him almost immediately. It's not like he needed to take a powder to recover from those godblasts.
And how come Thor can't regrow back body parts?