Complex sentence: As he drives away in Jeremy's car, Chris hits Georgina; his guilt over his failure to help his mother forces him to take her with him, but she soon awakens and attacks him, causing him to crash the car.
Split into simpler sentences: As he drives away in Jeremy's car, Chris hits Georgina. His guilt over his failure to help his mother forces him to take the unconscious Georgina with him, but she soon awakens and attacks him, causing him to crash the car.