I have played a fair bit of football in my time too and never, ever, ever, when jumping to head the ball, have my hands flown up in front of my head. Ever. Nor have I ever seen it. It can inadvertently hit your arm or hand at the side, you can misjudge a jump, be off balance and the ball can hit you when you are out of control, and in my experience strikers will often chance a hand or arm in the hope that the ref doesn't see it because they don't have much to lose really. None of that applies to jumping for a defensive header and have both arms come up unnaturally in front of your forehead.
I only have it in my memory and wish I could see it again, though I can't find it anywhere. Anyone?
Anyway, I'm with Pinchy in that he never explained it, which if it were me, that would be the first thing I would want to do if I cared at all about what I had just done and the consequences for the club I had an affinity for, and the speed with which he triggered the clause in his contract and buggered off means I want him back as much as Ch...... oh.