I have seen you tube video of races AT A DRAGSTRIP, run the wrong way, starting from the end of the shutdown, and going toward the dragstrip starting line.
So basically, they were running among trees, with no guardrails (except for the ones that could impale a car that runs into the end of them, from the wrong direction.) with thousand plus horsepower cars, with no traction. What could go wrong? Not to mention the starter that could be hit, the hundreds of spectators behind the "starting line" that could be hit by anything coming out the back of a "race car" (think driveshaft or rearend parts) or the hundreds of people along the track (remember, on the end of the track with NO GUARDRAILS). So, water under one tire, broken axle, etc, instant car-into -crowd.
It's really a wonder I haven't heard of spectators killed before this.
Prayers for all concerned.
Edit: in the mentioned video, I think I saw three racecars totalled in crashes.