I have to preface this by saying I have the Fast Intentions long tube headers and catback exhaust. It is really loud on cold mornings.
I worked night shift last night and before changing in the locker room I went outside to crank up my car and let it get warm. I walked in the locker room just in time to hear one of the guys saying he thought the apocalypse had just started! Nope, just the 370z on a cold morning.