(Peace...I have a pinched nerve in the 3rd cervical vertebra...I can't shake MY head much, either...and if I look over my left shoulder for more than a few seconds, my right arm gets numb!....This, for a guy who stood on his head at his 50th and 55th birthdays while folks recited "You are old, Father William"! The doc says "don't do that anymore!")

(Im my youth, I feared it might injure the brain...but)