The line comes from Amazing Horse, the viral animated song released by British animator Weebl in 2009 through Weebl's Stuff. The looping cartoon showed a proudly singing man and his horse while increasingly absurd claims built around a simple catchy melody. Shared widely on early YouTube and animation sites, the song became a staple of internet humour and remix culture. Its short sung commands were easy to detach from the full track, so editors kept reusing them as standalone reactions. The get on my horse moment survives because the invitation is clear, musical and recognisable without context.