Repressed Rage

 is a quirk Wasteland 2: Director's Cut.

Description
You were never the most outgoing person. Some would call you meek, others, timid. You have a habit of letting others walk over you, and rarely seek confrontation. But sometimes, all that anger inside just builds up, and like a powder keg, you go off. You are a slave to your rage. Any time you receive a Critical Hit in combat, during the next turn you unleash your fury. However, your meek attitude means you keep it bottled away the rest of the time.