Wonder what it's like to go insane? Just get in Tesla's new P85D sedan. The car has three driving modes: normal, sport, and insane, which accelerates the car to 60 mph with over 600 horsepower in 2.9 seconds. In this video, driver Brooks takes family and friends for a spin — and they completely lose their minds. Watch the passengers hold on for dear life in this hilarious video! Our favorite part starts around the 2:45 mark.