dunn mang waited for a chance to run. when his suv pulled into a gas station. he found his opening and raced as fast as he could across the street to another gas station. watch as mang frantically tries locking the store door. begging the confused clerk to call 911, fearing the tsarnaev brothers will follow he crawls to the back and hides in a storeroom. the clerk gets the bliss on the line and gets mang. following the murder of m.i.t. officer shawn collier, tamerlan and dzokhar tsarnaev hijacked the mang suv. reportedly tamerlan pointed a gun at him. prosecutors say the brothers had placed home-made explosives in the car's trunk and drove mang