Anecdote:

Making out with a guy I don't really know that well but nonetheless wish to impress with my formidable sex skills, I attempt that maneuver where you, from your reclined position--suddenly, passionately--flip him over onto his back and take charge. However, since I am unfamiliar with the landscape of his bedroom, and have disastrously underestimated the size of the bed we are on, my smooth move ends in a very loud and decidedly un-sexy crash to the floor. And, so much the worse, he cracks his head audibly on the nightstand on the way down. So there we are, in an awkward tangle of half-unfastened clothing and bruised limbs, and I have to make sure my poor abused friend is not bleeding from the knot on the back of his head.

What can I say? I saw that going differently, you know, in my mind.