Question: The John Wall Dance is a dance performed by flexing the arms and twisting the wrist, John Wall, an American professional basketball player for the Washington Wizards, of the National Basketball Association (NBA), first performed the eponymous dance during his introduction at Big Blue Madness in October 2009, at which location?
Sentence (from "John Wall (basketball)"): Johnathan Hildred Wall Jr. (born September 6, 1990) is an American professional basketball player for the Washington Wizards of the National Basketball Association (NBA).
Relevant evidence: Yes