In story mode, destroy the silver-colored sports car completely to get an Easter Egg. Once you complete the level you will be awarded with 1,000 coins.

Walk up to the car that looks like the DeLorean from the Back To The Future movies. It should fly off, leaving a flame trail behind. If this does not work, shoot it and it will do the jump to 88 mph. You will receive 1,000 coins at the end of the level.