Not all Powers found in Awesomes are beneficial. Many can be devastating and crippling deficiencies, or may be a mix of something useful and/or kickass with some sort of downside. The super-ability of heightened fear is one of these.
In the wide gradient of neuroplasticity and genetic variance, it may have been an evolutionary benefit for some to have had this Super Fear, and may still be an existing trait in animals like squirrels. In our current state, however, it can be a detriment to social interaction, insanely nightmarish, awkward, embarrasing, madness-inducing, or at the very least hilarious.