I don't know that anything I've ever done qualifies as MacGuyvering, but there have been occasions when I'd be at work and an order would not be called or a ticket flew out of the window and I had to get the orders out fast.
I do think there was a time when we were very busy and our dishwasher had either quit/called off, and I had to use a 1/2 sheet instead of a saute pan, b/c they were all dirty and noone had a moment to clean them.