After reflecting on the logic of running with the bulls in a kilt, I have determined that it is quite possibly the most logical garment to wear.

Taking what we know of bull fighting techniques, the bull fixates on the center of the cape as this is wear the matador is supposed to be standing, but the matador is actually standing off to one side. The kilt billowing out while running could act much the same way so that as the runner "zigs" or "zags" the bull will remain locked onto the trailing tartan, therefore providing the runner a few extra inches of buffer from the impaling points of Los Torros.

Now all I have to do is split this atom....where did I put my chisel?