I saw this news bit as I was riding the bus home last night and found something amiss.
It looks like the only one doing any reckless driving here is the
motorcycle driver, using the usual undisciplined tactic of trying to
overtake in-between lanes. The traffic cam footage cuts from when the
motorcycle fell, so I'm left to assume that the motorcycle drifted close
towards the truck's flatbed and lost control and fell, sliding under
the truck, then the rear set of tires ran over the victim's head.