Wow, that's harsh Carl.... that sucks no matter how it turns out doesn't it?.... You did it right, no one can deny it... everyone walks away (some in cuffs *snicker*)
Please pursue this issue and follow up on it. Talk to the store manager, and any of the employee's/witnesses you can, and ask them to come forward as well. Be sure to ask them to send trespass notice to him, and his wife and daughter, so that they are never allowed back in that store (maybe even an entire shopping center?)
Let's hope they offer him some counseling....
Sometimes, even though you know what you could have done to avoid a situation, you still have to wonder what you did 'wrong', huh?
It was the cornered rat syndrome. Cat corners a rat, even a rat will rear up to try to bite back.
Never back someone into a corner who has very little to loose.
True story-
I grew up out in the sticks with a outdoor/house cat that would kill and eat just about anything. It often brought back rabbits that were it's size or better. It also had a habit of leaving it's prey's heads on the doorstep.... but that, and my sisters gag reflex, are another story...
I brought home the schools rat for the summer vacation one year (someone had to take care of it). The rat, being the schools rat, was as tame as they get. He was handled consistently during the school days. The cat was absolutely enthralled with the rat in a cage and spent the first few hours just starring at it and we would swat it away from the cage as it approached. The rat spent his time hiding as best he could in a chicken wire cage in the middle of the living room floor.
Well, it wasn't long before no one was looking and the cat had managed to open the rats cage.
The commotion that ensued got everyone's attention well enough as that rat tore chunks out of the cat and the cat tore around the room trying to avoid the 'viscous' rat.
After we managed to round up and heard out the distressed cat.... well, the cat never inquired about that rat cage again...
I learned a valuable lesson about 'fight and flight' right then and there... it was backed up furthermore when I saw that same cat kick a large aggressive dogs but up one side and down the other when he got too close to the kittens....
Let's hope Billy Bulging Muscles learned the lesson without the wounds to lick. Given the situation, sadly, I'm guessing not..... to everyone he knows and tells the story to, he's the victim... went to defend his wife and daughter and this joker pulls a knife on him (they probably know him well enough to know better though)