The Non-Existent Pop Tab
This isn’t the worst thing that could happen to someone and is certainly not the worst on this list. But is it something you would be particularly happy about? Certainly not. It’s more like the straw that broke the camel’s back, especially when you’re already having a bad day.

Source: Imgur
Okay, maybe we’re making too many assumptions here. However, we understand why something like this would get on this person’s nerves. Imagine they already left the store where they bought this. If they were not in a good mood, this could make them go back home and skip the day.