Complex sentence: Carrie then telekinetically drops the cords like slithering snakes on the wet floor below, killing many of the prom goers as volts of electricity painfully run through their bodies.
Split into simpler sentences: Carrie then telekinetically drops the cords like slithering snakes on the floor below. Once the cables hit the water, many of the prom goers are killed as volts of electricity painfully run through their bodies.