After I got home from work yesterday, I turned my car off and got out, and noticed exhaust still whisping from the left tailpipe. I quick sniff and it smelled like exhaust, not antifreeze or oil thankfully. It continued for almost a full minuite before it stopped. I took the car for a quick drive and it did it again, and was again doing it when I got to work this morning. I don't think it's anything serious, but am just curious, as I have never seen this before, and was wondering if anyone had any ideas. It's a 95GT with 106K on it, pretty much stock aside from long tubes, and a cat free x-pipe. Any ideas?