Speaking of bicycles, as a teenager I was riding my bike through the neighborhood & then started looking at all the pretty clouds up in the sky that day. Then as I lowered my line of sight back to the road I saw the parked car I was riding directly into and slammed right into it. Not sure if anyone witnessed the event but it must have looked cartoonish, or at least something straight out of Jackass.
Luckily got out of that with just a few scrapes and bruises, and a lesson to always watch the road.