Moment knifeman casually walks into café and randomly stabs diner who fights back by punching him in the head - as police arrest man in his 50s over 'double stabbing'

A man in his 50s was arrested after allegedly stabbing a diner at a café, with the victim fighting back by punching the attacker. The incident involved a 'double stabbing' and occurred when the suspect casually entered the café and randomly attacked a patron.