Chest pump
In Paper Mario: The Origami King, it is possible for Mario to accidentally lock himself in a fridge forever.
If, during the investigation portion of Overlook Tower, Mario opens the doors of the fridge in the restaurant kitchen and jumps inside before the doors close, there will be no way for him to get back out as the door interaction prompt does not appear while Mario is inside.
Note Mario's silhouette inside the fridge, attempting fruitlessly to escape. The only way to continue playing is to reset the game.
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