What makes you think the overtaking was the cause of the anger? Perhaps it was something entirely different?
The guy being overtaken (let’s call him Jeff, because that’s his real name) was on his way to the vet with his dog, Buster. Buster had been a happy, bouncy, slightly manic labrador, until a few hours earlier, when he’d been badly attacked by a huge alsation/rottweiler/wolf cross with an owner as uncaring as he was irresponsible. Now, Buster was dying, in the back of Jeff’s car, his blood slowly seeping into the seats.
Jeff turned round to check on Buster, but it was too late. Buster looked up at him, not understanding what was happening, feebly wagged his tail one last time, and then his eyes glazed over, and he was gone.
Jeff slowed down to just 10mph, his eyes filled with tears at the loss of his lifelong companion, remembering when he first brought home his tiny puppy, the times they’d been together, and how it had so needlessly ended.
Just then, a car roared past him. He glanced up – and saw that the driver was the owner of the dog that had killed his beloved Buster. Fury and rage overwhelmed him. Jeff is not a violent man, and so all he did then was to shake his fists. But an icy cold fury came over him. And he knew that he would not rest until Buster’s death had been avenged.