One of the funniest moments from the first Thor: Ragnarok trailer was when Chris Hemsworth's Thor learns that The Hulk is his opponent in the arena and shouts Yes! and We know each other. He's a friend from work.
It turns out that the friend from work line was actually created by a kid who was visiting the movie set through Make-a-Wish.
In the interview below, Hemsworth discusses how his conversation with the kid led him to improvise the scene with the kid's suggested line and as of right now, it was the best choice!!
The movie comes out, Nov. 3rd.