A TSA worker in Miami was arrested when he "lost his mind" and attacked a colleague who repeatedly made fun of his small penis after the security screener walked through a high-tech scanner that showed his genitalia, according to Miami-Dade police.Rolando Negrin, 44, was arrested at Miami International Airport Wednesday morning following an altercation with a fellow screener, Hugh Osorno, Tuesday evening. Negrin is facing assault charges for allegedly beating Osorno with a baton in the airport's parking lot,