YouTube is full of "This is totally real, guys" ghost videos, and if you don't spend at least one night around Halloween browsing through a bunch of them, you're not truly getting into the spirit of the holiday. Here are what we consider the most eerily convincing videos in the genre.*

*Note: Science has found zero empirical evidence for the existence of ghosts, aliens, demons or any other supernatural creatures, and these videos will surely not fool an expert in video fakery. Unless he or she watches them alone, late at night, in the dark. Then they become very convincing.