Whoops! Don't have nightmares!
After my first 100 miler, I hurt all over (it was on an upright) and barely got upstairs. I thought I was going to have to sleep sitting on the bottom step of the stairs until I got the strength to tackle two flights. That was a spreadeagled on the bed occasion.
Coming back from Scarborough last year I bonked (quiet at the back there!) at Pocklington (about 108 miles done, with 20 to do) and did wonder if it would be easier to move to Pocklington so that I'd be home already. Fortunately, completely by chance, someone I knew walked past as I sat in the trike outside the Coop, and hearing that I was knackered, took me back to her house for a cuppa, which perked me up no end. That night, I managed cereal.