Those who completed Stage 1 now tackle Stage 2, and possibly Stages 3 & 4. Stage 2 features Rope Jungle, Double Salmon Ladder, Unstable Bridge, Butterfly Wall, Roulette Row, and Wall Lift. Stage 3 includes the Psycho Chainsaw, Doorknob Grasper, Floating Boards, Ultimate Cliffhanger, Pole Grasper, Hang Climb, Area 51, and Flying Bar. If anyone can reach Stage 4 and conquer it, they'll earn $1,000,000 and the title of "American Ninja Warrior."