Imagine having an uncontested layup to win a basketball championship at the buzzer — and then somehow missing that shot and losing the game. Now picture that sporting horror happening twice. That’s the kind of heartache U.S. shooter Matt Emmons, 31, has suffered. In Athens, he won one gold but then committed one of the most stunning gaffes in Olympic history when he was about to clinch his second: he shot at the target of one of his competitors, to the right, and fell to eighth place. In Beijing, he entered the last shot with a commanding lead, but a wild misfire dropped him to fourth. “The only thing I can figure is that my finger touched the trigger and set it off,” Emmons said in Beijing the next day. “I walked away and was like, Crap, it happened again.’” Can Emmons avoid another epic misfire in London?