A young Englishwoman was about to go somewhere in a car: the child was in place, the cosmetics bag was in her handbag, and the car was waiting in the yard. Wait a minute, but where is the car key? She saw it disappearing in the mouth of her one-year-old son.
She could call the ambulance or just wait till the key returns naturally. But the mother got scared and decided to take the child to hospital herself. She made attempts to open the door, to break the lock and even to break the door but she lost her time.
And suddenly a good idea occurred to her. She picked up the child in her hands and set his tummy against the place where the electronic key is usually applied. A snap went off and the car door opened. It was much more difficult to switch on the ignition lock, but she managed. The car started up and the young lady successfully brought her child to hospital.

Thus, without knowing about the principle of mediator, the mother coped with a complex inventive problem.

Source: Ytro.ru