Ezekiel the Almighty. Jules summons him by reciting Ezekiel 25:17. He makes his first appearance when he lets the bullets go through them without actually piercing through them. Jules acknowledges his existence, takes him seriously and decides to change his ways. Vincent calls it luck and discounts the deed. Ezekiel is offended.
Jules and Vincent discuss the incident in the car. Vincent condescendingly asks Marvin "Do you think god came down from heaven and stopped these bullets?" Ezekiel reacts impulsively by making him blow Marvin's head off. Vincent suggests that Jules probably drove over a bump. Or was that Ezekiel? However, Jules says “Hey, the car didn’t hit no motherfuckin bump.” Well, that leaves us with just one conclusion. Ezekiel squeezed the trigger.