The Karussell at the Ring has this amazing feature that it's a cambered corner... Dive into it as you're supposed to, to be on the ideal line, and you can easily get over 50mph.
Pull over to the flat part, like the WRX clearly did, and you have to take that corner at max. 30-40mph to make it round there. He also deliberately slows down to let the Z/28 pass...so not much of "being his a.. handed over" going on I'm afraid.