uuum, nice try! But next time, intervene from cover or just call the cops. Get your phone out and start recording. Confronting an asshole only leads to misery. Even if the good samaritan was armed, this would not have ended well for either party.
Whatever happened to a good old fashioned right cross.
Walk up nonchalant and knock the dude the fuck out.
Then call the cops. Game over, no shots fired.