Easy completion of Insurance Fraud activity
Get a Five-0 police car and go to the scoring area. Then, try to get up to top speed and get into a head on crash with an oncoming car. If done correctly, you will get a x4 vehicle bonus, a x2 civil vehicle bonus, a x5 vehicle eject bonus, and (if you are lucky) a x2 distance bonus. It is possible to get scores as high as $400,000 on a single crash using this technique.