Honestly, I've been "conditioning" my neck and my nerves. Ever since I've decided to hang myself I've been keeping a scarf around my neck, tied in a slipknot. Occasionally I'll tighten it until I'm light headed. I only do this while seated. It doesn't heart, but it is uncomfortable but only for a few seconds. Like a hug you know? Anyway, I'd imagine if I wnt all the way I'd eventually get so light headed even that sensation of being uncomfortable would go away.