You need to do a boost start at the start of a race in a car, boat and plane. To do a boost press and release R in time to the announcer's three, two, one and go. Your exhaust will go red, purple and then blue if you get the timing right. A puff of smoke if you fail. You will need to find events where you start in a boat and plane (e.g. Monkey Mayhem and Sanctuary Speedway ). You can press Start and restart if you fail.