If I jumped you I would have stolen that iPhone X
That means youll update it with your broken beat up face, then when youre unbruised youre still out of luck because it wont recognize you again.
You could still use the passcode if someone chopped your nose off or whatever
This is a Repost from r/memes lol
Since all phones are required to have the ability to call 911 even when it's locked, I'm sure face ID will not be a problem.