Encumbrance

Special move

Trigger

When you make a move while carrying weight

Roll

Not rolled

Full text

When you make a move while carrying weight up to or equal to load, you’re fine. When you make a move while carrying weight equal to load+1 or load+2, you take -1. When you make a move while carrying weight greater than load+2, you have a choice: drop at least 1 weight and roll at -1, or automatically fail.

Read it in the rules: Encumbrance