Sideshow is honestly more of a meme than it is a Weapon. When you Reload it, you'll instead throw the Pistol and start up an endless "shoot the target" type of mini-game.
Hitting the
Sideshow before it comes into contact with an enemy or terrain will have it bounce back, refilling its Ammo, and causing a minor explosion. It may not be effective, but it sure is amusing.

