Watch this video in context on Unity's learning pages here -
http://unity3d.com/learn/tutorials/modules/beginner/physics/colliders-as-triggers
How to use a Collider as a Trigger (also known as a Trigger Zone), in order to detect when an object is within a particular space in the game world.
Help us caption & translate this video!
http://amara.org/v/V6cJ/
