" I stared at MacFinn for a long moment. I believed that he was telling me the truth. That he didn’t have much control, if any, over his actions when he transformed. Though it occurred to me that if he wanted someone dead, he could probably point his monster-self in the right direction before he lost control.
Note to self: Do not cut MacFinn off in traffic. "

― Jim Butcher , Fool Moon (The Dresden Files, #2)