Complex sentence: An officer is taken out of the apartment on a stretcher as Jimmy runs in from the football game and looks at all the dead cops and starts getting angry and then locks himself into a bathroom, crying and breaking the mirror, very upset.
Split into simpler sentences: An officer is taken out of the apartment on a stretcher as Jimmy runs in from the football game. After seeing all the dead cops he locks himself into a bathroom, crying and breaking the mirror, very upset.