The Cockroach Beatbox is a very unique lesson about how the brain works and how electric signals (or spikes) effectively control your entire body. By plugging a speaker into a cockroach leg, Greg Gage is able to demonstrate how sound converted to electricity is able to control limbs the same way a brain does. Put together by TED-Ed, if you dug this, be sure to check out some of TED-Ed’s other videos.