There are some great videos of this awesome spectacle on sites like YouTube, but I will try to describe it to you. You spear the pickle on the two prongs of the suicide plug and turn it on. You will likely get a whiff of the smell of burnt pickle and then a weird chemical reaction will happen.The pickle will start steaming and then light up like a light bulb!
Yes, it emits yellow light! It is awesome to watch. WARNING, SCIENCE CONTENT. This is how it works. The electricity flowing through the pickle excites the sodium ions that make up the salt in the pickle. When the electrons fall back down into their orbit around their atom, they emit the yellow light. You have to go watch a video of it to understand how awesome it is.