OK this was too funny, the author takes a USB connector and the charge circuitry out of a bug zapper to combine the two to make a USB killer. Basically a device that will charge up from the USB port on your computer, then release it on the data lines (thus frying your computer). Why would you do this? Cause you can? Maybe the inner spy in you?
http://www.instructables.com/id/How-to-Make-USB-Killer-From-Bug-Zapper-Racket-/