20 most annoying things at the grocery store

Are you an "aisle blocker"? Perhaps you're a dreaded "express lane abuser"? If you can lay claim to either of these titles, we have two words for you: Stop it! These two types of shoppers are at the center of frustrating experiences No. 4 and No. 5 on our 20 Most Annoying Things at the Grocery Store list.

How many of these pesky supermarket situations do you recognize?