Truck crash on SE Freeway today (Brisbane)

[Hunter]

Was on my way back from christmas shopping this afternoon and came to the SE Freeway and was coming up the Duke Street on-ramp when I noticed the traffic was a bit sluggish for no apparent reason. Then I see some dude with a backpack running down the embankment from the freeway (which is raised). Seconds later I hear a cop car roaring up behind us in the transit lane with sirens on. As it passes I notice its a paddywagon and it eventually throws on the anchors and 2 coppers jump out. This dude sees the coppers getting out and starts legging it across the on ramp then slows down and gives up running.

Thinking "what the hell" I keep driving then I see this massive semi sitting jack-knifed on the freeway above us. I look closer and realise its lost its entire front end, that is the entire front running gear, axles and suspension included, are no longer part of the truck and the truck cab is sitting on the roadway with the wheels about 50m behind it. Turns out the truck had smashed into a concrete roadwork barrier and this is what apparently tore the truck body and its running gear apart. News said diesel went all over the shop which then lead to the closure of the SE Freeway at that point.

I was totally amazed to see that. Witnesses on TV said the driver swerved side to side and smashed into several barriers before one of them pulled him to an abrupt stop. Miraculously nobody was injured or killed!

Anyone know what went down? Was the guy I saw running trying to get away from the cops?