Well, then perhaps Tim shouldn't have gotten in a name calling match in the first place. After all, they were "letting off steam" and then Tim decided to kick this guy's ass. If he got stabbed, it was his own fault. The entire point of the exercise, as you put it, was for it to stay nonphysical. Calling someone a ****** has about the same ultimate effect as calling someone a poopoo head. They're words. Tim decided to make it physical.
You won't see me crying any crocodile tears for Tim.