I'm GLAD FOR HIM and HIS FAMILY that he'll recover.
Seems from other accounts, it's BETTER TO HIT THE 4 WHEELER than swerve to avoid and possibly die.
I say this because I hit a 4 wheeler in '03 with a Combo as I tried to stop quickly when the A.B.S. DIDN'T (some Drives locked and I was heading towards a jack-knife), so off the Brakes and into the 4 wheeler.
4 wheelers want to play on Roads with Trucks as if these Heavy Vehicles can manuever quickly. Some 4 wheeler drivers learn, some die as well do some Truck Drivers.