When I was in School I had a massive temper and would often be involved in fights with other school kids. My Brother used to antagonise me and then run behind a door and phone our parents to say I was trying to hit him which made me see red, so one day I broke down the locked door and klapped him. It took him jumping out of a 2nd story window to get away from me and grabbing my father's Pistol to keep me at bay. I still remember what the barrel pushed against my forehead feels like, but even that didn't stop my rage I yelled at him to do it, and when he couldn't I told him he was too much of a p___y to do it. He dropped the gun (thank whoever you believe is up there) and broke down sobbing. That pulled me out of my rage and I was also sobbing uncontrollably. From that day on I have never hit another person or any living being (I was 15 at the time, I am 44 now) but I still have to work hard sometimes to stop the rage from rising. As an example 2 years ago a wooden cupboard door had been left open in my kitchen (just above my eyeline) I hadn't seen it and turned around to get something and the corner smacked into my head, before I could think I swung around and with 1 punch shattered it into pieces this freaked out everyone in the house including myself. I do not and will not own a gun, because as the cupboard door showed me I can't trust myself. No matter how much I think I have pushed that side of myself down or how much control I think I have over it. I'm 6ft3 when training and at peak fitness I weigh 100kg at my heaviest and least fit I was 140kg, I'm currently training again cycling, and gymming my fat ass off and am 120kg (I have knocked a Springbok on his ass by mistake. We were both running around a corner in opposite directions and collided, ie both our faults. When I saw who I was helping up and apologising to I was very surprised)
So I am very cognisant of the fact that if I Iose it I could probably kill someone with my bare hands without meaning to and it scares me and makes me try to be as zen and peaceful as possible, but it's something I have to work on for the rest of my life.
I'm not excusing the behaviour of OP'S assailant at all. A1.5km bicycle chase should be enough time to realise you're out of line and should calm the f down and turn around. Hell even a few seconds should be enough time to wind yourself down, especially as an adult.
Sorry for the wall of text and questionable punctuation and going off topic, but after reading Ouzo and other's tell of their personal battle's with the inner rage beast. I felt the need to add my own. I have only told a tiny handful of people in my life about it, because I'm deeply ashamed of that part of myself, so it's cathartic to let it out.
OP I hope you're attacker, feels enough shame for his actions and has the integrity/backbone to come forward and take responsibility and face the consequences. For you and for him because if he can't self regulate, he needs help desperately before he kills someone.
