Driving home drunk on a Friday evening. I fell asleep and drifted across the oncoming lane. I went into the ditch at an angle and the leftover personal pan pizza went airborne off the passenger seat and blasted me in the chops. I woke up and stuck my foot on the clutch by instinct. I slowed down and came to a stop about 5 foot in front of a culvert. I waited until the oncoming traffic cleared (all with eyes as big as saucers) let out the clutch and burned out of the ditch.
Another time, driving home from the midnight shift, sober for once, only a 6-pack to wash the taste of work out of our mouths. All three of us fell asleep. I drifted into the incoming lane and was woke up by the sound of an airhorn, I jerked the wheel hard to the right, just missing an oncoming grain truck. The guy in the back seat got his head blasted off the window, the guy riding shotgun spilled his beer all over his crotch so it was pretty great. What a way to wake up. Later on I became born again and this sort of behavior stopped.