There are two main ways people get run over by trucks - they get reversed over when they have their back to the vehicle - or in the case of articulated trucks, the driver doesn't swing wide enough with the prime mover at the commencement of a turn, and someone standing within the turning arc gets run over by the trailer wheels.
The second accident is most common at intersections or T-junctions when a truck driver turns left (with a RHD truck). Pedestrians standing at the corner are often unaware that the driver hasn't allowed for the trailer wheels "cutting the corner" - and the driver drags the trailer wheels up over the kerb and flattens the unwary pedestrian.
In industrial environments, it is of primary importance that reversing is kept to a minimum, and that a (human) guide or reversing camera is used to ensure that no-one is behind or in line with the vehicle when a reversing manouevre is undertaken.
A person wearing hearing protection and with their back to a reversing vehicle is a prime candidate for getting run over.
It's not likely that anyone would ever "make a full recovery" from being crushed by the wheels of a truck - laden or unladen.
Far better to be very aware of your surroundings, and to make sure that drivers can see you at all times - and that you preferably keep several metres away from any vehicle that is regularly moving.
EDIT: In the Channel 7 news video below, it appears likely the baggage handler was run over by the LH front wheel, when the truck driver drove forward, and turned sharply left.
It's likely the handler was standing in the drivers blind spot, at the far LH corner of the truck cabin, a notorious position for the initiation of truck accidents.
The truck driver is largely at fault here, for not ensuring that there was no-one in this blind-spot area, when he drove forward and turned sharply left.
There's a reason why many Japanese trucks, in particular, have glass extending well forward in the front lower area of the LHS door. It's to try and eliminate as much of that blind-spot as possible.
The handler is responsible to a lesser degree, for not being aware of the possibility of the truck moving off in a LH turn, and by not being aware that he was in the truck drivers blind spot.
Man hit by fuel truck at Perth airport