George Zimmerman is selling the gun he used to kill Trayvon Martin. He's selling it on a gun auction website, and the bidding starts at $5,000. It's not clear whether or not there have been any serious bidders. What is clear is that many people had a few words for Zimmerman and ideas for him and his auction. None of them are positive. Hell hath no fury like the Internet reacting to a news story like this. Here are the funniest reactions on social media to Zimmerman's gun auction: