Demolition Derby Photography

I have been doing  Demolition Derby photography and Figure 8 races for a handful of years, all of them at the Oakland County Fair.  I am intrigued by a couple things.  The first is the engineering and manufacturing skill (or lack of) that the mechanics and drivers bring to the events.  I try to show some of the lengths they go to to build cars to put on a show.  The second is what happens to the cars when they come back from a heat and what the teams have to do to get them ready to continue running.  What is most striking is that it appears any team will do whatever they can to help another team continue running.