Lots of scenes with two parties exchanging gunfire, often with like full machine guns, no one's wearing ear protection, and they're always urgently yelling shit at some teammate standing right next to them.
Even though they're yelling, the only thing the dude you're talking to is going to hear is "EEEEEEEEEEEEEEEEEEEEEEEE" cuz his ears are now FUCKED.
Many people don't realize how loud guns are. Shooting a rifle without hearing protection is physically painfull. I don't get how people who've been to war are able to hear anything after that.
Even as someone who spends a good amount of time at the range, I never thought of this until Bill Burr did that bit about why he has a smaller pistol for home.
It didn't ruin John Wick, but any of the indoor scenes, especially the one where they'll have low gravely emotionally loaded dialogue... I have a hard time suspending my disbelief.