Adrenaline Rush Hour (Discovery Channel)

Adrenaline Rush Hour serves up thrills, spills, and chills with detailed commentary -- but little analysis. The narrator explains what's happening moment-by-moment and sometimes can spot the instant when something goes terribly wrong. The show usually provides some medical follow-up as well, explaining the extent of the resulting injuries; given the dramatic nature of the footage, there are surprisingly few serious injuries. Some sequences even include interviews with the participants, providing more details about the traumatic incidents.

What's often missing is the why. The show might explain that a particular intersection is the site of frequent accidents, but it doesn't address whether authorities have tried to deal with the issue. And though the clips are exciting, it's not clear whether they're meant to function as pure entertainment for viewers craving action, primers on avoiding common stunt mistakes, or cautionary tales.