The St'át'imcets (Lillooet) circumfix ka...a and the Skwxwú7mesh (Squamish) particle txw have been termed "out of control'' morphology and given various analyses using both causal and modal formalisms. This paper proposes that out of control marking in these languages can be understood in a hybrid framework that uses modal notions such as desire and ability as nodes in a causal model framework. Key to this approach is the notion of "efficacy" (Copley 2005). The proposal points to ka...a and txw sharing the same anti-efficacious meaning, and provides a paragdigm of theoretically possible anti-effiacious causal structures.