Ghost videos are some of the most horrifying clips on the web. Sometimes they are of simple balls of light caught in an abandoned room. Others may show ghost cars eluding the police then vanishing into the night.

But these videos are truly horrifying because they raise the question of what if? If these videos are real then what is that sound you hear as you go to sleep, or why did that door close unexpectedly? The entire afterlife may be proven in these clips. Or it might just be weird tricks of the light and really creepy camera angles. That’s for you to decide.