To have told this man he's a complete twat

[IloveCokeZero]

So today went to dd and ds to a fast food resturant after we went to cinema. I was in the que ordering and a middle age man starts shouting at the staff. This man was complaining about his burger. So we were giving our order to a young boy who was probably around 16 and this man starts shouting at the boy rudely and he was trying to explain that it was to do with the burgers seasoning (something only that line). So a more experiance member of staff begins to speak to the man meanwhile we are still ordering. To which the man then throughs the burger at the boy/other member of staff. Ive now got ketchup on my clothes and so does dd ds and the other member of staff.

So as the man leaves i tell him hes should be ashamed of his behavior and that hes a complete twat. I said to the boy does this happen often, he said quite regulary.

I know i probably should not have used the word twat but he was so rude to the boy/staff calling them stupid, thick and scum. DD and Ds are both teenagers so its not like they were young.

[Tuskerfull]

I think well done you for saying something. I probably wouldn't because I'd be afraid of getting something thrown at me (like a punch, considering he'd already lobbed the burger) but I'd secretly wish I had.