mine did it the whole ride home. anytime i brought the RPM down near 2-3k but of course when i got it in the garage i couldnt get it to do it! but it would do it while i was sittign at lights if i revved it up.
NY State Trooper: So what makes your car so special to have SVT all over it?
Me: Er...It was made by Fords SPECIAL Vehicle Team?