I know the reasoning behind it but eventually the slower class's will be getting passed by the fast guys anyway. What happened to me and several other unfortunate racers at the MINT may have been avoided (maybe not) by increasing the interval to at least 30 seconds, at least the faster classes should be 30 seconds and then decrease the interval down to 15 for some of the slower classes. I raced the Midnight Special last year and the start was the exact same way for the first 15 miles you couldn't see your hand in front of your face, I know its off road racing and this wasnt my first race so I know how to race in the dust. I am just pretty new to the idea of 15 second intervals and think it promotes a very unsafe environment. I am in no way pointing any fingers at anyone for what happened to me, I am just curious what you guys think about the 15 second interval?