What aperture did you use Chili? It's hard to focus on a moving object when panning, so I usually use a smaller aperture to increase depth of field & increase my chances of a sharper shot. I prefer to really blur the background like you shot using 1/60th.
I too have plenty of shots with a glove, or boot in focus but not the helmet.
I too have plenty of shots with a glove, or boot in focus but not the helmet.