Full SPOILERS ahead for Avengers: Endgame!
Robert Downey Jr. tried several variations of Tony Stark’s death scene in Avengers: Endgame, according to the film’s editor Jeffrey Ford.
“When we were putting together the end of the movie, when we shot Tony’s last moment in the first round, we shot a bunch of different options. Robert had different ideas,” Ford told Collider. “We shot a run of different performances for that last moment. Some of them were crazy. Some of them we would never have used.”
Source: IGN.com Endgame Editor Reveals Alternate Versions of Iron Man's Death Scene