Pew Pew pew
antonio banderas had a similar problem filming once upon a time in mexico; he was used to filming gunfights using real guns loaded w/ blanks and he had to use fake guns in one scene and he kept making pew pew noises with his mouth without realizing he was doing it
and ewan mcgregor made ksh ksh lightsaber noises while filming fight scenes in the phantom menace
What’s the first thing kids do when playing pretend (when they first essentially start acting)? They make the sound effects themselves for their weapons. You can’t help it! It’s a thing that can’t be helped no matter who you are, how old you are, or how long you’ve been acting!
Coulson knows how to cheer up his hero!
The one where Clint goes to the secret base after the events of CATWS
Peter “sorry” Parker
avengers age of ultron entertainment weekly
Age of Ultron: new stills