Honestly it's not that big of deal, half those wrecks the driver was problably killed, that's the bigger deal, your gonna have nightmare's? The family of those lost driver's are having far worse nightmare's...
I have nightmare's because i've seen shit like that first hand, especially when you have to cut out an 18 year old kid that's dying in his brand new gt500 while your sweating to get him out and his life depend's on me. That's a nightmare.