... You're driving along & suddenly realize your eyes are closed.
... You're 3 blocks from home but still want to pull over to the side of the road & sleep NOW.
... You find yourself driving 20mph in a 45mph zone & you're hunched over, peering out the windshield like a little old lady..
... You keep walking into door jambs & walls while doing rounds at work.
... You space out in the middle of a thoug....