Jimmy Fallon Rides the Second-Longest Zip Line in the World Jimmy Fallon tried the world's second-longest zip line in Puerto Rico and he had a blast! MUST SEE! Trending China's Road Network is Expanding at a Furious Pace "We're doomed!" We are indeed, and for so many reasons... Wolves Protect Puppies from Bear This is what happens when a bear thinks it can feast on puppies from a wolf pack. Hockey Players Try Red Bull Crashed Ice Track Without Practice Some hockey players got to try the Red Bull Crashed Ice track in Boston and it was anything but a walk in the (Fenway) park!