Perfect time not to write
I spent three hours of my day at the vet, waiting to hear what's wrong with our cat. Three long hours with nothing to do. Plenty of time to do something light, like writing.
But I didn't write, obviously. It wasn't the time to write. Even though I would have had a good chance to do it, and entertain myself for a while at the same time. Perhaps to pass the time more quickly. I just couldn't get started.