A character being chased in a jungle or forest finds him or herself cornered, or that his or her pursuer has gained on them, and seeing they have no choice jump into a conveniently placed waterfall almost always escaping. Bonus points if the pursuer doesn't follow suit, start shooting into waterfall or assumes the target is dead. Different from Suicidal Gotcha in that the villain may see the target swimming away but stays there.
Hello, Unknown Troper. You'll need to get known to lend a hand here.