I would ask if I could help the situation. I would get the caregivers name and agency and report them. If the patient was verbal I would ask if they were ok and needed help. I would look closely for any marks, bruising anything on the patients face, arms, etc. if the person was non verbal I would demand to see the badge of the caregiver. If refused I would call the police. This is elder abuse! Verbal or physical, abuse is abuse.