Shoppers who linger and linger and linger around the food item you want to buy. They just stand there, looking at this and looking at that. We Canadians are polite; we don't say "Get the *#()# out of my way." So we have to wait until they are done.
When I go around and come back, those shoppers are still there, looking at this and looking at that. Almost as if they are deliberately trying to annoy me. And there is at least one in every shopping trip, even when the store is almost empty.
It must be conspiracy. The world hates me.