to do another Thor movie. We've always wandered why the actor's so smiley and friendly and

it's because for him, filming fight scenes is actually very relaxing.

I love shooting action, to be honest, because I don't think about anything. My brain switches

off. There's something very zen about doing martial choreography.

Really? Getting slapped, explosions and running around doesn't look very zen.

Elsewhere at Thor: The Dark World premiere in LA, Chris Hemsworth had a less relaxing

time, describing the Bear Grylls conditions he endured.

I'll tell you what, the shooting in Iceland was the most challenging. I had a sleeveless

costume, it was minus five or something. There was snow or whatever around you and to stop

your teeth chattering the whole time was certainly a challenge.

Well nothing a quick punch up with Tom Hiddleston wouldn't fix. Ah, much better.

We face an enemy known only to a few.

Known only to one.