mr.alcheng- yah, you'd want to run a fan in your garage if you do start up your car especially in the cold cause the car will idle high. glad to hear it was fun though.
when i fire up my fit (parked outside) in the am hours, i roll it down to the end of the driveway (just clutch-in) to prevent any exhaust to enter the garage. the garage door isn't as air tight as the windows on the house, so.