Unfortunately I saw a video of a similar accident where the motorcycle driver slid under the truck which turned across the road unexpectedly in a similar way, and one of the wheels went over the rider. He survived for a couple of minutes, during which his riding buddy held his hand, and talked to him until the end.

Videos like this are quite disturbing but I would make watching some of them mandatory during the driving course. Some people just dont get they are literally driving lethal weapons.