Every action has an equal and opposite reaction. My teacher is trying to apply this rule to complex situations, and it isn't really making full sense to me. He says that 'wasting time' reading the newspaper leads to the opposite reaction of not learning. ? He seems to be explaining it pretty poorly. I personally believe that Newton's Third Law cannot be applied to any complex situations. I think it can only be applied to base physics. Kicking a ball is one of countless situations that could have Newton's law applied to it (Really, when you do anything physical, it comes into play). But when you get creatures and intelligence involved, it no longer theoretically applies to their advanced situations. They still have to follow the rules of physics, of course; but you cannot compare Newton's law to behaviour, in my opinion. Bah, I'm all over the place here. I am really curious about life examples of Newton's law. I'm probably wrong, it's just that I feel that anything above the base level will have a crazy amount of seemingly random modifiers that will disprove the rule. PLEASE no physics examples.