We've established many times over that quadrotors are going to kill you, probably in your sleep. And that's, you know, that's okay, we've come to terms with it. Or had, until we found out their crucial weakness: they're actually hilariously bad at quadrotoring. Watch, giggle, and hope that it's one of these fools that comes for you in the night and not their more accomplished brethren. [UPenn via IEEE Spectrum]