Yeah unexplained supernatural experiences are cool, but have you ever been 9 or 10 years old, having a sleepover at a friend’s place, gotten up at night to go pee without turning the lights on, and then heard something coming up the stairs before you see the creature – a long-limbed, gaunt but distinctly humanoid figure dashing up on all fours, who then spots you in the dim light, as mortified as you are horrified, stands up to walk like a human, heading silently into his room without saying a word?

And that’s the way you learned that some people like to go up stairs on all fours like a dog when nobody’s looking, and that your friend’s 15-year-old brother is one of them.