Young Make a Wish boy, wrote one of Thors famous lines.
Entertainment Weekly recently sat down with Chris Hemsworth, where Chris revealed that this line was created by a child visiting the set from the Make-A-Wish foundation. Chris said:
"We had a young kid, a Make-A-Wish kid on set that day […] and in between the takes I was talking with him, and he goes, ‘You know, you should say, He’s a friend from work!‘"
Director Taika Waititi has said that they wanted to play up Chris's comedic side in this third installment. And with a wonderful moment such as the Hulk scene, we are sure to be in store for a more comedic Thor than in previous films.
Source: Entertainment Weekly