Marty McFly: Doc, you don&#x27;t just walk into a store and-and buy plutonium! Did you rip that off?<p>Dr. Emmett Brown: Of course. From a group of Libyan nationalists. They wanted me to build them a bomb, so I took their plutonium and, in turn, gave them a shoddy bomb casing full of used pinball machine parts.<p>Things did not go well for Doc Brown