The Avengers: Infinity War audio commentary is just one of the many special features that are available in the release and the Russo Brothers open up about the nuts and bolts of the massive superhero film.
And the joke was something that was strongly considered by the Russo Brothers, as revealed in the Infinity War commentary track.
To learn more about the special features included in the Infinity War digital release, head over to Marvel.
The joke would’ve come up while Tony Stark and Doctor Strange are meeting up in the park at the beginning of Infinity War.