I was watching tv and eating Doritos.
I don't remember what I was watching. It was probably The Simpsons. Whatever it was, I was fully invested, because I wasn't looking at the Doritos I was eating, which tasted fine. After a while, I had a need to look into the bag, to reposition the chips to make access to them easier for the way I was sitting. When I looked I noticed some big, dark crumbs sitting in the bag.
The crumbs were dead ants.