If you haven't watched the show Magic For Humans on Netflix, you should. Do it now. We'll wait.Justin Willman is a magician and he does really funny tricks and pranks, like this one that's catching on. It involves tricking someone into thinking they're invisible. The Invisibility challenge has become a thing. And it's hilarious. Except for the kid who sometimes ends up crying.Here's some people who pulled it off awesomely. Like David Dobrick.