A Critical Failure is a rare occurrence when a character's action catastrophically fails to produce the intended result.

When a 1 is rolled for a Dice Check, roll another D6. If another 1 results, the action is considered a Critical Failure.

There is a 1/36 (2.78%) chance of a Critical Failure for any action, and the degree of the ensuing catastrophe can be expected to be inversely proportional to it's likelihood!