Honestly i don't ever do it that much. I have a near perfect driving record and i like it that way. There was an article in the chicago tribune awhile back about a guy who got caught doing around 170mph on a Hayabusa motorcycle in a 55mph zone. He was arrested(for doing double speed limit) and from what i understand got totally butt rammed by the judge(lost license, etc). I don't ever want that to happen to me, so i save it for the track myself. I did once(only once) do 150+mph on the toll road in my Type R right after we dropped the JUN engine in it, cause i just had to know right then how fast it was. My speedometer ended at 150 so i really don't know how fast I was going though.
Bouncing off my rev limiter in 5th gear is something i'll never forget! 