I can't believe no one has mentioned the 6-ball Well of Souls multiball or Eternal Life multiball in Williams Indiana Jones! Other favorites are STTNG Final Frontier, Lord of the Rings movie mode multiballs (TTT, RTK, FOTR) or the 2-ball DTR where you knock the ball out of the magnet, and TSPP Springfield Mystery Spot with the reversed flippers. I had never seen that before then.