Complex sentence: If a drop zone lands on that contestant's spot, the trapdoor opens and they drop through the floor and are eliminated from the game; otherwise, they remain in the game and becomes the challenger for the next question.
Split into simpler sentences: If a drop zone lands on that contestant's spot, the trapdoor opens and they drop through the floor and are eliminated from the game. Otherwise, the contestant remains in the game and becomes the challenger for the next question.