For the people who can't see the video. The girl's mom was not responding, she tried to wake her, eventually slapping her in the face with pizza.
Knowing something was wrong after that she called 911. Her calm call which she gave all the necessary information led EMS to Mother and saved her
life. They don't go into detail about what the cause of incident was...
It's lucky the daughter was there for her mom, and her quick thinking of slapping her in the face with a pizza was excellent. I'm glad she wasn't
eating popcorn, cous-cous, or a light cereal grain, she'd still be slapping her mom around with those foodstuffs with no response.