"There is no hope!"

I think, with Max, taking this new material as canon, Furiosa felt something in that cab very familiar, a fever dream almost, of something she had lost, much like the green place itself. Something she may have known was fleeting but desperately clung too, like some guardian angel made flesh. In Fury Road, Furiosa repeatedly does things against her instinct. Shown wonderfully by Theron's subtle facial expressions. Jack fills in those bubbles. (By the way, I felt the film hinted two, maybe three times, that Jack may have been a double agent for Dementus, but they didn't go that way with the final edit.)