The samophlange is a running gag in Warcraft. It is believed to be revolutionary in design and very valuable to goblins... despite no one, including the goblins, knowing what exactly a samophlange is supposed to do. The earliest quest in World of Warcraft which deals with the samophlange is Samophlange.
According to Wowpedia, the "blasted Samophlange, keeping one's foot off of it, and not knowing what one is, originated in an infamous ThunderCats outtake." The outtake can be heard here. The 2011 reboot of the cartoon series referenced the same outtake.