"Doc let Marty do most of the talking [to the engineer]. The teenager was good at that sort of thing — much more so than Doc, who did better with dogs and machines — and Marty got the engineer talking right away. / 'How fast can she go? Why, I've had her up to fifty-five myself.' The grizzled train man patted the chugging locomotive by his side. 'They say that fearless Frank Fargo got one of these up to near seventy out past Verde Junction.' / Marty nodded eagerly, acting impressed, which pleased the train engineer no end."