Complex sentence: In the ending sequence, Mike throws a ceiling lamp at her: the lamp hurts her head and she falls unconscious while the swimming pool is being filled with water turning red for a tin of red paint knocked over when Mike threw the ceiling lamp.
Split into simpler sentences: In the ending sequence, Mike throws a ceiling lamp at her. The lamp hurts her head and she falls unconscious while the swimming pool is being filled with water turning red for a tin of red paint knocked over when Mike threw the ceiling lamp.