#5: The Toilet Network (from the Harry Potter series)
Let's say—very hypothetically, of course—you are zoned out and you walk into the men's toilet instead of the women's. Let's say you need to make a quick getaway. Tip: probably don't try to escape by physically climbing into the toilet. It worked for Harry Potter, but it almost definitely won't work for you. Occasionally, you end up with dry feet in the Ministry of Magic. And other times (99.9% of the time), you are squishing past Carl on your way back to the corridor, trying not to think about urinal cakes, dripping your way into Algebra. Hypothetically.