Piggy's Day/The small door
From Create Your Own Story
You open the door, and squeeze straight in. Doing so, you however notice an irregularity.
Piggy: "Wait, there's no floor here - this is a venting duct!"
You fall down the vent, and wake up, banging your head onto the low metal ceiling. After you get up, you hear a loud CLANK.
Piggy: "Ah, we must be at our destination."