When Rob Summers was paralyzed below the chest in a 2006 car accident, doctors told him he would never walk again. But with the help of an electrical stimulator implanted onto his spine, the 25-year-old Portland, Ore. man is once again on his feet. "It was the most incredible feeling," Summers told the Associated Press. "After not being able to move for four years, I thought things could finally change."Summers case was described in a new study published in the English medical journal "The Lancet."