X's Y is not a horse

Origin

On March 7th, 2010, a Youtube user called "Rubberfruit" released a Gmod video called "Francis's bike is not a horse" in which Francis rides a tricycle, with Carnival Game music from Dark Carnival playing, then Francis stops, and Ellis flies over a small building, flops in front of Francis, and claims that the Tricycle is a Horse. When Francis tells him otherwise, Ellis kicks him over a large building, where he explodes on impact, then Rochelle appears with a distorted face and moos like a cow, then the camera zooms to Ellis's face, which is also distorted.

The very next day, "Heavys swan is not a horse" was uploaded by "Iwannapopy" which replaced Francis with a Heavy, the Tricycle with a swan boat, Rochelle with Nick, the Moo with a Meow and the camera zooms to Ellis's butt at the end instead of his face.

In the day's that followed, even more responses appeared. (ordered by date uploaded)