Never underestimate your opponent, especially a stranger in the public you’ve never met before.
I have a friend who is a retired military police officer. He is built like a tank, tall muscular and intimidating.
He’s the one who taught me never to underestimate anyone. He man handled, beat and fought countless people. But he also admitted that he’d been beaten bruised and hospitalized by people shorter and weaker than him.
When you fight someone in public, you never know who you’re dealing with … he could be an untrained jerk like you and me … or they could be a 150 lb MMA fighter and highly trained martial artist with expert training.
Or the person you’re fighting could have a knife, a pencil, a screwdriver, a piece of glass or their friend or friends you didn’t see or believed wouldn’t interfere all jump you and beat you to a pulp.