Wait, so did he ch*ke his dad or was his dad hit by a car? And he just feels guilty?

I think he’s feeling guilty. He let go of his father’s arm when the truck was about to hit.

Dad was truly hit by a car, but before that happened he got into a fight with Woowon and beat to the point he thought he had killed his own son

No, his actually having a nightmare about killing his father by choking him (like his father did to him)
Bcoz his father's death was from the car accident and not him actually choking his father to death

Thanks everybody!