Man 1: A woman is standing on a corner. An equestrian goes by.
Man 2: What's an equestrian?
Man 1: It's someone riding horse. A pedestrian goes by.
Man 2: What's a pedestrian?
Man 1: It's someone walking. Finally an velocipedist goes by.
Man 2: Its someone riding a bicycle. Who knew the woman?
Man 1: Who?
Man 2: The horse man knew her.
*Man 1 conferring w/ friends*
Man 1: A woman is standing on a corner. A guy on a horse, a guy walking, and guy on a bike all pass by. Who knew the woman?
Friends: Who?
Man 1: I still can't figure it out. The answer's horse shit.
horse man knew her = horse manure
(It was funnier before it took me twenty minutes to type this -_-)