A. A pair of twin toddlers snuck out of the house and got behind the wheel—you just can’t see them because one is working the gas while the other steers.
B. It’s the life-size remote controlled car of some reckless rich kid who thought it would be fun to destroy a little public property.
C. The driver was abducted by an Alien and the car immediately lost control, thus crashing into the nearest convenient fire hydrant.
Any other thoughts?