A taxi jumps a curb at a busy intersection and hits a British tourist and a cyclist , police believe . Dr. Oz and his student staffers run to the scene about a block away from their hotel . The tourist 's leg is amputated , and a good doctor uses his belt as a bandage . Oz , who saw the makeshift tourniquet , praises the doctor who jumped into action .
A taxi jumps a curb at a busy intersection and hits a British tourist and a cyclist , police say . Dr. Oz and his student staffers run to the scene about a block away from their office . The tourist 's foot is amputated , and a good Samaritan uses his belt as a tourniquet . Oz , who tightened the makeshift tourniquet , praises the plumber who jumped into action .