How pathetic!
Pathetic right? But these things happens. Perhaps not in the same way but,once therr wasn't any pre-agreed sharing formula amongst gamblers, there would always be one person who would sort out means to cheat the other with some entitlement argument like we have in OP.
In the real sense, it's wrong of the account owner to seek a lion share in this as, it wasn't agreed upon, the risk was equaly shared and as much as they would have had to carry equal amount to a lose, same ideology should follow instances of profit.
I don't see a reason why i would go physical while gambling as my model for gambling is very simple although, I would hate to discover that I was being cheated on a good bet.
Heat of the moment more likely. Us men however we deny it are susceptible to drastic measures when we're desperate and backed into a corner, sometimes (as in this case of the fucking idiot who thought it would be actually nice to dupe a fellow gambler off of his fair share of win) we even cause these drastic situations to come around. But the thing is, most of us right here wouldn't even dare get into fights like these let alone get into an interaction that would lead to an altercation of sorts. Dare I say we don't even have friends to do this with cause we're either embarrassed to barge them into this thing/hobby of ours, or we just suck at socializing, so while this is a general possibility through and through, I don't think this is something that happens everyday.