You shouldn't give people mean looks.
Tom is driving on the highway when a nearby car changes lanes and cuts him off.
Tom wants to show the driver cut him off that he's upset.
Tom honks his horn at the driver who cut him off to let him know that he was there.
Tom pulls up along side the driver who cut him off and stares him down.
Tom is able to vent his frustration before returning to his normal driving behavior.
Tom takes his eyes off the road and nearly rear-ends another vehicle.