One time I was biking on a residential road and slowed down to enter a roundabout, and the driver behind me laid on the horn, so I stopped my bike in the middle of the lane and turned my head to face him.

He opened his door, so I stood up and laid my bike down.

He stayed behind his open car door and said

you're lucky I don't have my glock on me

and I responded

You could just hit me with your car

And he just gently got back in his car without saying anything else (and did not, thankfully, decide to hit me with his car)