Newton's third law

When one force puts force on one thing, the other force puts an equal and opposite force to the first one

A guy has a broken down car that unfortunately broke down in the middle of the street. He starts pushing it. As he pushes it he gives a lot of force. At the same time the car is giving an equal and opposite force at him

Two men just finished a business meeting. Some people ask them to pose for a picture. They pose leaning their backs to each other. The first person puts some force on the second person. The person is putting an equal and opposite force back on him so he doesn't fall