I have no idea what it is. If I did, I wouldn't ask. :-P
I think the picture was taken near Santa Barbara, CA. I'll ask the owner of the picture again to make sure. People have said Cunningham this and that, but Google turned up nothing even close to similar. Some have suggested a modified C5.
PS: Poor Enzo. That's what, the fourth wrecked Enzo now?
PPS: Why the hell is no model kit company in the world producing a kit of the McLaren SLR?