When you check out the bonus features, you can see what the actresses actually looked like on set when filming the Black Widow sequence, but as they shared, a ton of it was practical. When Scarlett Johansson first read the scene, she didn’t think much of it, but when it came actually shooting it on a motorcycle with Pugh right behind her, it sounds like it was pretty intense.
Article source: https://www.cinemablend.com/news/2573635/scarlett-johansson-florence-pugh-totally-surprised-black-widow-epic-motorcycle-stunt-scene