Lol I find that scene extremely funny too!
If I recall off the top of my head correctly they were talking about the dude with the mind stone keeping the stone and him being able to wield the hammer. something along the lines of if he can wield the hammer he can keep the mind stone something, something and these days safe is in short supply. something like that
The dude with the mind stone is Vision.
Thor says, "I'm going to miss these talks of ours."
I LOVE THAT PART!
Here is how it went EXACTLY!
Steve: But if you put the hammer in an elevator...
Tony: It would still go up.
Steve: And an elevators not worthy.
Thor: I'm going to miss these talks of ours.
The big meaning full line was.
Steve:The rules have changed, we are dealing with something new...
My favorite is Clint all the way!