After completing the plane stunt scene in Episode 1, Roland Walken can be found in the back of the plane. While talking with him, clovers can be seen falling on David's side of the screen. This triggers the extra case, which is more of a minigame. Collect falling clovers, avoid lightning bolts. If one falls to the bottom of the screen, the game is over. Collect 100 points to complete the extra case and the achievement.