There used to be a big problem w/ A1 (Rabbit) VW front wheel bearings. You pretty much could not torque the axle nuts too much. I used to use a 3/4" breaker bar w/ a 6' long pipe and stand on it, to tighten mine (or the 3/4" impact gun w/ 180 psig of air behind it).

I know Cameron is pretty meticulous w/ Pablo, and I know Kirk is almost fanatical about presenting a well prepared car, so I'm a bit hesitant to speculate that the axle nut wasn't torqued enough, but that's what the pictures look like.