Turning to stone: the process of replacement of the organic residues of plants (and animals) with insoluble salts, with the original shape and topography being retained.
(figurative) obduracy; callousness.
(figurative) Sheer terror; great fright.
Confused and very angered by this, Bill thinks it'd be a good idea to undo Ford's petrification so he can tell Bill how to get around the barrier.