Moment From The Falcon and the Winter Soldier S01:E04
After we realise that Walker has injected himself with the Super Soldiers serum, he witnesses Hoskins' death. In a fit of rage he pins one of the Flag Smashers and kills him with the shield.
John Walker loses patience with Sam and Bucky as they learn more about Karli Morgenthau.
Tags: Disney+, superhero, based on comic, spin off, marvel cinematic universe