6/13    Sometimes I accidentally type Ctrl-X in vim and am consigned to some
        sort of vim purgatory where the program no longer responds to input,
        not even the ctrl commands that it "helpfully" lists at the bottom
        of the screen for "Ctrl-X mode."  Can anyone tell me how to escape from
        this?  And no, "use emacs" is not a helpful response.
        \_ Let me guess: you enter this mode by typing C-x C-s to save. The
           problem is the C-s, not the C-x; C-s suspends terminal output. Hit
           C-q to resume it. You can just hit escape (or, I think, any other
           key) to get out of Ctrl-X mode. -gm
           \_ Thanks, you rule.