LOL - gotta love it!
NO2 does wonders, is cheap and the poor unsuspecting competition doesn't hear a thing. My guess is he was running happy gas and laughing as his $500 expenditure on a $35K car laid waste to a $80K M3. He'll enjoy that for a while, but eventually his rings will be junk. Just enjoy the all-around car that the M3 is. There is more to life then going fast in a straight line...