Fully locked up brakes with 4 wheel smoke. The Porter Special is a car with a long history http://justacarguy.blogspot.com/2013/12/porters-special-with-center-seat-300sl.html
Images from the Daily Mail via http://www.motorsportretro.com/2015/03/racing-legend-jochen-mass-involved-in-big-crash-at-goodwood/
It is believed that the Jag took the sudden unexpected notion to cut across the front of the Mercedes and head for the pit lane... causing the crash
http://www.telegraph.co.uk/news/uknews/road-and-rail-transport/11491036/Benz-out-of-shape-4m-vintage-racing-car-in-crash-at-Goodwood.html
the following sequence is damn good photography, right place, right time
found on http://autoweek.com/article/classic-cars/one-mercedes-benz-300-sls-porter-special-crashes-rare-lister-jaguar-goodwood
