It's wrong to harm others with a car.
Jeff, who suspects that his girlfriend is cheating on him, follows her and sees her being affectionate with another man.
Jeff wants to get even.
Jeff finds some condoms that his girlfriend keeps and soaks them in hot sauce for the other man.
Jeff waits until they are in an open area at night, then takes his car and runs them both down, injuring them.
Both the girlfriend and the other man suffer without getting seriously injured.
Both his girlfriend and the other man are seriously wounded and spend lots of money on recovery.