Newton's Laws of Motion

There is an old question that goes like this: "A space explorer moving through the middle of intergalactic space, very far from any planet or star, notices a large rock floating around the cabin of the spaceship. The explorer wishes to take it as a specimen from an alien planet. Should he push gently or kick it toward the storage compartment?"

You now know that there is an equal and opposite reaction based on Newton's Laws and perhaps you are worried about the force of that rock hitting your spaceship!

It is doubtful that you will ever be in a spaceship. So, how could you apply this law in your life on Earth today? Give an example.

I need 75 to 150 words.