I’ll hop in my car tomorrow morning and try and move it and see what happens.
Perhaps there ought to be a stronger advisory in the opening post about getting “stuck” in this mode.
For what it’s worth when I used it I actually pressed the “Exit Diagnostic Mode and Restart” button, which did do that (restarted the screen), but as said when I put it in Drive earlier today, after a good 12 hours or more of it being asleep, it spontaneously showed “Dyno Mode” on the screen again in red letters with all the warnings.