Around 14:55 Darla runs over a demon and stops immediately after the back passenger tire runs over it. Then the angle changes after she put the car in Drive to behind the car. When she drives off there is no body under the car.
Lilah mentions that they don't crucify at Wolfram and Hart because it's "too Christian." Crucifixion was not a method of execution used by Christians. It was a Roman method of execution that was actually used on Christians.