Fortune seems to smile on you when you take risks! Any time you take an unnecessary risk (in the GM's opinion), you get a +1 to all skill rolls. Furthermore, you may reroll any critical failure that occurs during such high-risk behavior.
Example: A gang of thugs opens fire on you with automatic weapons. If you crouch down behind a wall and return fire from cover, Daredevil gives no bonuses. If you vault over the wall and charge the gunmen, screaming, it provides all of its benefits!