his ass IS a mechanic, look how well he's holding that impact gun to tighten the bolts on the rim, hell if he keeps at it, he could join a pit crew

oh mbp
should I help get him a scholarship?

He could be untightening the bolts, possibly due to a tire malfunction. Such a malfunction could mean a flat tire or an unbalanced tire that needs slam-on weights. I see no weights on the tire (although most of it is cropped), so most likely, he could be simply changing it due to shrapnel or some foreign object.

Or he could just be tightening the bolts.