how many test drives do you get in something like this before they clear you to take it out for a spin solo ? '' he listened intently , only interrupting with the occasional nod or words of agreement . but you do n't need to decide today . he ca n't drive himself anywhere with only the one arm . a history she knew in rough detail . soon all the wagons were rolling , each leading a line of slaves . regardless , he refused to allow her to be sad in his presence if he could help it . 