my old sohc 2.2 before my h22a would go to 6800 its lame to be sitting in nuetral and reving, if he was taking it to 6800 then you should of heard it bouncing off the rev limiter, that ever happens even when your driving then don't push it so hard next time. And I'm guessing your buddy has a tin can sound with a coffee can exhaust tip on his muffler and everyone was pulgging there ears ...yelling Idiot!!