No Strings on Me

Absent characters can really mess up the narrative of a game. It can be easy if an adventure begins and ends in one location out in the open, but if in the middle of a dungeon the sudden ineffectualness of a PC is problematic, especially if an encounter was balanced for more players than are present.

A Dungeon Master I once had was fond of the “bodybag of holding” where one PC would just step out of the limelight for a moment until they were able to return. He really liked to maintain the world as a consistent and logical place where things happened for a reason, and liked to avoid characters just vanishing in the dungeon and reappearing randomly because their player was called away.