I saw this video posted on Facebook. Pretty simple and dangerous challenge here. Basically the contestant wraps their body in firecrackers and then lights the string. All kinds of things wrong with doing this, but if this catches on, make sure your kids do not participate.
The guy in the video is in quite a bit of pain after the firecrackers go off but it could have been much worse. A few years ago a professional football player lost parts of his hand in a firecracker accident so strapping them around your chest and torso probably is not ideal.