Take A Number
We assume that there isn’t a live grenade in the picture below because that’s probably illegal. We’re not entirely sure because it feels like something that would be acceptable in Alabama but who knows? This is potentially one of the messiest passive-aggressive notes in history.

As we can see from the picture above, the author raised the stakes. They took tensions to the next level by attaching an explosive to their note because they wanted to make their point clear. We think that they got everybody’s attention but human resources may not share the same appreciation (via Cheezburger).