THOR: Now I know what you're thinking. Oh, no! Thor's in a cage. How did this happen?
Well, sometimes you have to get captured just to get a straight answer out of somebody. It's a long story, but basically I'm a bit of a hero. See, I spent some time on earth, fought some robots, saved the planet a couple of times. Then, I went searching through the cosmos for some magic, colorful "Infinity Stone" things... didn't find any. That's when I came across a path of death and destruction which led me all the way here into this cage... where I met you.

SURTUR: This is my crown, the source of my power.
THOR: Oh, that's a crown? I thought it was a big eyebrow.
SURTUR: It's a crown. 
THOR: Anyway, it sounds like all I have to do to stop Ragnarok is rip that thing off your head.
SURTUR: But Ragnarok has already begun. You cannot stop it. I am Asgard's doom, and so are you. All will suffer, all will burn.
THOR: That's intense... To be honest, seeing you grow really big and set fire to a planet would be quite a spectacle. But it looks like I'm going to have to go with option B where I bust out of these chains, knock that tiara off your head, and stash it away in Asgard's vault.
SURTUR: You cannot stop Ragnarok. Why fight it?
THOR: Because that's what heroes do.

THOR: The sun's going down. It's getting really low. The sun's going down. It's getting really low.
BANNER: Would you stop saying that?
THOR: I just need you to stay calm.
BANNER: Calm? I'm on an alien planet!
THOR: It's just a planet. You've been on a planet before.
BANNER: Yeah! One!
THOR: Now you've been on two... That's a good thing. It's a new experience.
BANNER: My neurons, they're firing faster than my brain can handle the information. The whole thing is totally different this time. In the past, I always felt like Hulk and I each had a hand on the wheel. But this time, it's like he had the keys and I was locked in the trunk.
THOR: Alright, well, you're back now, that's all that matters.