Last night on Late Night, T.I. performed “Ball” off of Trouble Man with spasmodic fervor, though unfortunately sans Lil Wayne and his spasmodic fervor. Plus: Arnold Schwarzenegger doled out many a humorous diss — Jay Leno’s “an idiot;” Chris Christie is not overweight, he’s just water-retentive; and the state legislature comprises Johnny Knoxville-types and their jackass kin. Also, David Letterman called Don Rickles (out of the blue?) only to hang up on the poor guy as Regis Philbin sat stunned. Watch our compilation to see what you missed.