When Foster the People's anti-gun violence anthem, "Pumped Up Kicks," was released in 2010, it quickly went viral. But not everyone immediately noticed the cautionary tale about gun violence that lead singer Mark Foster relates in the lyrics: "All the other kids with the pumped up kicks/ You'd better run, better run, outrun my gun." Although its tone is jubilant and upbeat -- prompting some fans to blast it during celebratory times -- "Pumped Up Kicks" is about a boy named Robert, who fantasizes about shooting up his school. SNIP With emotions raw after Vegas, Foster said that he and...