Lock Knob on Manfrotto BeFree 494 Ballhead is Stuck

"If your Arca-Swiss B1 does freeze up, the first thing to do is to stay calm and not panic. The problem is easily remedied and requires no tools to fix. Simply grab the main locking knob firmly and force-rotate it clockwise about an eighth of an inch. This seems backwards since you generally tighten the knob by turning clockwise, but this is precisely why you should learn this before you need it. No amount of force in the counter-clockwise direction will loosen the knob, yet it is surprisingly easy to unfreeze the knob when you force it clockwise. Once this is done, normal operation should be restored with no harm to the ballhead whatsoever, and you should be back in business in less than a minute."​