Devika grinned a bit. "Oh yeah? How are you going to manage that, though? Some kind of chemical, or a direct trigger to the... what's it called again... amygdala?" She'd done some studies on emotional effects within the brain. While she was no neurosurgeon, she found that it helped her understand why her powers made people respond the way they did, and how she could stop that if she had enough time. "I mean, people have all sorts of fears, though some of them are pretty much baseline. Fire's a big one, usually. Insects and spiders, for a lot of people. Other than those, people's worst fears have an element of psychology to them, rather than instinct. A firefighter may not fear the flames so much as a regular person." She shrugged slightly. "How are you gonna hit them all?"