The interactions between Thor and the other Avengers. Always puts a smile on my face. The next Avengers movie should definitely have a funny scene with this in it. XD I feel like Thor would call him metal man though.
Original Pin: Yeah, I kinda figured Rocket didn't know because at the end when Groot "wakes up" as a sprout, he looks down at him with shock and surprise and when he looks away he has tears in his eyes.