The best bit is you can just leave the drone flying above while you race and it'll stay there for at least 20 minutes. If anything happens like a low battery or whatever it will return to the take off position and land itself. I always take off from a position well away from anyone so that if it had to return by itself then there would be no issues of people in the way etc. Also during the drivers briefing I just make sure people are aware of the drone operating and to stay out of the way!