A woman is in the hospital after she had a baby

A woman is in the hospital after she had a baby. A nurse comes in holding the newborn child.
Right as she enters the room, the nurse trips, dropping the baby on the floor.
The mother starts screaming, 'AHH, MY BABY!'
The nurse lunges to pick the baby up, but instead, kicks it across the floor and under the radiator.
The mother continues screaming.
The nurse goes to fetch the baby and as she picks it up, smashes the baby's head against the radiator.
The mother is in absolute hysterics.
At that point, the nurse starts laughing.
The mother screams, "What the hell is wrong with you!?"
The nurse says, "calm down, calm down. It was a joke!
Your baby was already dead".