What is Newton's Third Law of Motion?

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Newton's Third Law: The mutual forces of action and reaction between two bodies are equal, opposite and collinear. This is also easy to imagine. If you and your friend are in rolling office chairs and you push your friend, you will roll in the opposite direction. This is in the case in every scenario but it gets more difficult to see (especially when there are other forces stopping it).
My favorite scenario to imagine is when you run on the surface of the earth. You and the earth are experiencing the same forces in opposite directions but because the mass of the earth is so huge compared to your mass, we don't notice it. And keep in mind there are other people running on earth a the same time!
Newton's Laws of Motion:
First law: The velocity of a body remains constant unless the body is acted upon by an external force.
Second law: The acceleration (a) of a body is parallel and directly proportional to the net force (F) and inversely proportional to the mass (m), i.e., F = ma.
Third law: The mutual forces of action and reaction between two bodies are equal, opposite and collinear.

What Is Newton's Third Law of Motion