The 3rd Law of Motion
For every action there is an equal and opposite reaction.
When you push one domino they all fall.
If the guy falls off of the edge of the boat, the boat is going to tip over.
If they both hit eachother, they'll both be damaged.
How it relates to my life:
This relates to me in many different ways. The first example is when I'm swimming and I push back on the water, the water pushes forward on me. When we walk and apply force to the ground, the ground pushes back on us. When I throw a ball up in the air it bounces back up to me. If I pour soda in a cup the bottle decreases and the cup increases with liquid.