If you don't mind my asking what type of camera/lens was used and how close was your pit spot to the accident?
It is amazing that driver walked away. His first call after family should have been to whomever installed the cage on that car. He owes them big thanks.....and a few drinks.
Based on the data, looks like a Canon SLR model EOS 40D. Selected file resolution appears to be 1023 x 682 (But of course, that might have been a much lower resolution due to the attachment process - the original files may be larger - and potentially clearer). It'd be capable of roughly 5-6 shots per second (dependent also on speed of memory card used), and files at max setting can be 10mp. My guess would be a 100-300mm zoom lens was probably mounted on it. An extender may have been used.
Any Ford GT'ers have roll cages mounted in their street cars (non dedicated race car). I imagine the danger to a non helmeted driver in the tight confines of a GT would make roll cage design difficult or prohibited.