Joker's harpoon toy gun (more commonly known as the "'BANG' flag gun") appears as an ordinary gun at first. When fired, rather than a bullet, it pops out a flag reading "BANG!". However, after the trigger is pulled again, the flag itself is shot out the barrel and impails the target. In DC Universe Online, the gun is a pre-order trinket called "Joker's Trick Pistol".
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