Coworker doesn't stop - Dash Cam Vids

Read on to see what happened next.
I know, I should have kept the engine running. I was so mad at the time I wasn't thinking about it.
I didn't know who it was until he got out of the car. This kid is probably 18-19 years old, weighs maybe 100 lbs. soaking wet, is so skinny he has to wear skis in the shower to keep from going down the drain, and is one of those typical ultra-shy socially awkward video game nerds that most likely still lives at home. And remember, they call me Bear for a reason.
I waited for a minute thinking, "We have to clock in at the same time. You have to go in sometime." Then he made his sister get out of the car first. Classy. I got out and screamed a typical WTF! She just gave me a pfft, rolled her eyes, and motioned to her brother like "I wasn't the one who was driving. He's the idiot." When it was obvious I wasn't going in, he got out with a pitiful, "I'm so sorry!" with a look on his face like "Please don't kill me." I yelled at him for a few and continued to berate him in the locker room.
I talked to the sister later to get the point of view from the car. She said she was playing on her phone and even she saw me coming. She yelled at her brother for not stopping. When they parked she said, "So what you gonna do now?" He said, "Go in, why?" She replied, "Look behind you." He was so oblivious he didn't even realize I had followed him all the way in. Then he thought I was some thug that followed him just to pummel him. She told him, "He works here, stupid." and then she got out of the car.
He avoided me all day. Once I calmed down I talked to him later and told him that had I been one second earlier or he had been one second later, I would have hit him most likely putting him in the hospital or possibly killing him. I told him to think about that the next time he blows a stop sign.
(Audio muted at the end due to copyright issues.)