I was teaching my girlfriend how to drive stick shift today and after we switched back, I drove home. We were at a stoplight and I saw smoke coming out of the two heater vents above the radio. I immediately shut off the engine and put on my flashers and checked my gauges. They were fine, no check engine, the temp was normal and oil pressure was fine. I am wondering what the hell the smoke came from and why??? While I was teaching her she had the parking brake on without me knowing for a couple runs going into first gear, but we switched and the incident occurred later on way after we had switched. Anyone know why it would be smoking??