Long story short, the car that Christa driving was still being chased by a dozen enemy cars behind her, and there were even some Gargoyles who had jumped and crawl to the car driven by Christa, so Oliver had to get out and overcome them all by climbing onto the roof and knocking those Gargoyles down. One by one the Gargoyles fell and were crushed by their boss's car, but their other members still tried to attack Christa's car, even though Oliver could always swiftly knocked them away.
Meanwhile, Siege, kept trying to hit Christa's car from behind, he intend to shake Oliver who was on the roof and make him fall. But fortunately, only by relying on a knife, Oliver was able to destroy the windshield of the car driven by Siege, because Oliver has extraordinary abilities in throwing objects.
