Trapdoor (Mario Pinball Land)
Trapdoors are objects that appear in the shipwreck of the Frosty Frontier Stage and in Porcupuffer's rematch room of the Fiery Stage in Mario Pinball Land. These are wooden objects with white targets that are placed on the left and right sides of the room. Hitting a trapdoor reveals a cannon, which shoots a single cannonball bomb. After that, a trapdoor closes. Cannonball bombs can also hit it. Hitting a trapdoor grants 3,000 points.
- Nintendo Power Volume 185, page 117