Biking uphill on my way home, it struck me that there is a very limited number of times left of this particular uphill bike ride. Soon, there will instead be an unknown number of trips along a completely different route. Including, yes, a completely different uphill climb to get home. I keep imagining that it is a bit less steep, but it will probably be more than enough to get the heart pumping.
One previously infinite number became finite and started counting down, while a new and currently infinite number appeared right in line behind it.
Fun to happen to notice a change like this before it actually happens. While the numbers are still counting.