So? The guy got in, pressed his pedal to the floor and then the pup jumped on it the right way. Or maybe being flustered by the dog in his way, he pressed the pedal at the right time.
What does it buy him to lie?
Anyway, weird things do happen.
With his foot on the brake when the car was put in gear by the dog, how did the car accelerate? Incompetent driver ran his car in the water and blamed the dog. Next...