Court records reveal the chilling moment police believe the Tsarnaev brothers revealed themselves as the Boston Marathon bombers to a terrified carjacking victim. --SNIP-- The man pointed a gun at him and said: 'Did you hear about the Boston explosion?' and 'I did that.' He then removed the magazine from his gun to show the victim the bullets. 'I am serious,' he said. --SNIP-- In his first comments since the night of violence, the driver said he was spared because he 'wasn't American.