While looking out a window with another employee manager x came up from behind and surprised me by putting one hand on my shoulder and the other he formed in the shape of a finger gun all the while asking for my lunch money and pushing me into a corner. While I realize it was a joke, he was very rough and left marks where he jabbed my side and on my fore arm where I was pushing back against the corner.
This is my first workplace. Sub 200 employees. I'm not even in my twenties and this retired marine was pushing me into this corner.
I have photos of the marks, but I have not talked to anyone. What should I do and what should I expect. All of the managers are very closely knit and I feel if I report this, I will lose my position in IT.