A sharp chill originating at top of spine, shoots down spine and felt all the way to fingers and toes

it's called a fag-attack.

I think you were just molested by the ghost of Michael Jackson.

Reefer madness.

Dopamine.
Or "The Tingler".

Reverse Kundalini.

You drank too much NyQuil.

Better get on that fish oil diet, like 18 or 20 a day half in the morning the other half before bed - or just with meals 3 times a day. Literally your nerves running out of insulation... Seemingly unrelated, but due to the NEM axis, you may also be at risk for a heart attack, and a whole host of other things.

You may also have unhealthy blood sugar. Look for a chromium vanadium supplement and stay away from fried foods, sugar and wheat flower.

[link to en.wikipedia.org (secure)]

I can trigger this on command for some reason.

[link to www.youtube.com (secure)] obama did it

[link to www.youtube.com (secure)] obama did it