This movie is pg-13, there is next to no gore. There is a ton of fighting, someone stabbed in the eye, and another person impaled, but there is no actual blood or graphic imagery.
The wife is a physical therapist, and is briefly shown working with an elderly woman who mixes up people’s names and forgetting what day it is. This is played as a joke and isn’t brought up again.
Dan throws a knife into someone’s eye. It’s not graphic or lingered on, but it is shocking. Look away when the wife is being held at gunpoint in the hotel room if you want to avoid it.