The situation: you're watching tv eating crackers of some kind. You drop one and reach down to pick it up, but you actually pick up a different one that has been sitting on the floor for weeks. You do not realize this until your teeth meet soggy dust filled cracker.
What's that? That's never happened to you and the comic makes no sense? Oh. Sorry.
Comic 'Five Second Rule (A Haiku)'
I drop a goldfish.
Recover an older one.
It is centipedes.