Complex sentence: Trish hits the mysterious driver with their car and runs him over several times, seemingly killing him, but they are horrified to see a giant wing tear through his trenchcoat and flap frantically in the air.
Split into simpler sentences: Trish hits the mysterious driver with their car and runs him over several times, seemingly killing him. They are horrified to see a giant wing tear through his trenchcoat and flap frantically in the air.