[Porsche-O-Phile]

I'd think 7g deceleration would be very, very hard on the body. Humans can take a lot of gs - iirc about 8g transverse (which is why astronauts lie in their backs) but not too many negative gs. This is why pilots of high-performance military jets roll inverted and then pull down and roll right-side-up to level off from a quick climb - to keep the gs positive and acting more or less transverse. It's a limit of the human pilots, not the aircraft.

Anyway above about 2.5g negative bad things happen physiologically - blood vessels start popping in the eyes, possible retinal detachments, etc. I'd think 7g acting transversely to the driver's body in deceleration would cause internal organs to slam against the ribcage and all manner of other nasty things. I wonder how many of these guys have serious injuries or long-term ailments after doing this for a while...