As we go through life, we develop little traditions, inside jokes, and other idiosyncrasies that make perfect sense to us, but aren't always easy for others to understand.
And while we tended to get exposed to each other's little codes for the first time when we went over to our friends' houses as kids, that doesn't mean we can't still get a bit confused when we come across an unfamiliar one as a adults.
Furthermore, it's through this growing that we start to recognize this subcultural clash doesn't just extend to other families, but to whole institutions and even entire nations.
But while many of these points of confusion between us can be easily explained by any layperson who grew up in the environment where these unwritten conventions make sense, there are some that puzzle everyone who isn't blessed with some very specific knowledge.
And one man recently came across a couple of bizarre examples while driving in Pennsylvania.
Be advised that the video featured in this article contains explicit language
