I climbed up a cherry tree, and there I found cherries. I did not pick cherries, nor did I leave cherries. How is this possible? Before you answer, the tree is a closed environment, no birds or anything else have any significance. There is only me, and the cherry tree.
This is possible:
As you were climbing back down the tree, you slipped, in the process knocking down all the cherries that were in the tree - thus neither picking nor leaving any.
You have "cerasumophobia" and you destroyed the cherries using your cherry laser blaster (or by some other nefarious method).
The cherries were ripe and happened to fall off even as you were pondering about whether to have them for breakfast, lunch or dinner.