OMAHA, Neb. - Two robbers who thought they had an easy mark in a 68-year-old Omaha man were surprised on Sunday. Police said Earnest Coleman was sitting in his car outside an Omaha grocery store when a young man jumped into the passenger seat with a gun and demanded Coleman's money. Coleman responded by grabbing the robber and his gun, and exchanging blows. A second robber came to Coleman's window and hit the elderly man, police said. Undeterred, Coleman pulled that man into the car and began to hit him, too. The two robbers then ran away — without Coleman's money and without the gun. Police are reviewing surveillance footage from security cameras, a spokesman said. The robbers appeared to be teenagers, Coleman said.