A friend of my just got his transmission replaced so one night we found his car parked on the street and dumped an entire quart of transmission fluid under his transmission and made sure we slapped some fluid all over the underside of the transmission. The fluid trail stretched from one side of the street to the next.
He brought the car back to the shop and they just about threw him out.
P.S. This happened many years ago before I had an appreciation for the environment. Now I would only spill about half a quart