Fox needs to improve his spatial awareness. He’s putting his health at risk not paying attention to the oncoming defenders at the line.
It’s the exact same play as the Aho one. He’s making an abrupt cut to try to jump into the play and then goes knee-on-knee with a guy who didn’t move away from his trajectory at all to make contact. It’s “smart” in that it draws a call and helps his team, but it’s playing with fire.