[KingEdward]

the best thing is to move on and make distance while not turning
one's back to a possible threat.

I probably would have made a little distance while saying things like
"sir, please stop threatening me", "sir, please stop" "sir, don't come
any closer."

There's always someone afterwards who will talk to the cops who you
never see or didn't know their window was open and they saw/heard
everything.

I would not challenge the drunk, or tell him to **** off and get lost.

I would say and be the passive one. Unless he chose otherwise.