Ezekington of Ancient Order of UMs on Doomhammer (US-A) was sick of paying the flight masters to get around in Pandaria. After all, he had a perfectly good Sunstone Panther that cost him a pretty penny already. Why should he have to spend hundreds of gold a week to get from one archaeology dig site to another? Just use the auto-run button, you say? Unfortunately, he has the tendency to tab out of the game while auto-flying, get distracted reading Cracked articles, and end up dead with an unrecoverable body somewhere in the middle of the ocean. (Not that this has ever happened to me, of course.)
There had to be a better way. And Ezekington figured there was a ton of lazy cheapskates just like him out there. So he invented the Mount Cannon! Just pay 10 silver, load up your mount, and you'll be launched to the point of your choosing. The downside? They're constructed by engineers. One out of ten rides will end with you either blowing up in mid-air or being transported to another continent. But isn't that a small price to pay?