That was a lot more common before cameras were installed. Even Canada's first Prime Minister wasn't afraid to cross the floor to clobber some guy.
Macdonald's temper sometimes got the better of him, such as in one incident in the House of Commons when Donald Smith angered him so much, that he charged across the Commons floor to physically attack him. While he was restrained, Macdonald was unrepentant, proclaiming "I'll lick him faster than Hell can scorch a feather!"
The notion of being civilized . We are, after all, animals.