Item

Item is an option in Fleeing the Complex during the "Presumed Dead" pathway.

Henry Stickmin can use the item box while sliding down a hallway of The Wall on his handcuffs and going straight for Friedrich Spielen and Haroldt Cüper. When choosen, Henry obtains a Boo power-up and turns invisible, allowing him to bypass the guards and reach the elevator at the end of the hallway, while also losing his handcuffs. This results in a success.

Trivia

 * The item box is a reference to the Mario Kart series.
 * Clicking the box while it's still selecting the power-up causes it to spawn a Shoop da Woop creature.
 * This is part of the "bruUGHNO" achievement.