That was amazingly bad. No words to describe it. Let's hope they can brush it off and take care of Real Bettis this week.
I sometimes think a complete and utter disaster like that, really a once in a multi generation type result, should be far easier to get over than say blowing a 2-0 lead to lose 3-2.
It was so flukey and so against their current form, that they might be able to simply ignore it. I would not even waste time watching the film as trying to fix that level of incompetence seems like a waste of time.
I think as a coach you roll the dice and hope it was really a one time thing, and continue to prepare your team as you always have. You can re-evaluate if it goes sideways again.