Punched by Patient

Did an overtime last night (New Moon can wait hehe) and I had a very easy patient but the next bed is a different story. The patient is barking mad. He was very very confused and violent. I was so please that I did not have him. The one who looked after him is an agency nurse. A very tall and big woman, around 6'2'' in height and moderately obese. At the start of he shift I kept asking if she needs a help. But she said she can manage and she wants to be alone. I think she was stress. Then early morning around 4am she was punch. She was very upset and went home straightaway. I'm sure she's going to have a dark eye circles because the patient is big and very strong. Oh life as a nurse is hard indeed.