From:
http://www.faa.gov/about/office_org/...dent_chart.pdf
As DL flight 1961 from Minneapolis, MN-Atlanta, GA arrived at the gate in Atlanta, a flight attendant notified the captain that they had smoke in the cabin. The captain opened the cockpit door and confirmed heavy smoke in the cabin. The passengers were told to continue deplaning out of the boarding door. After a few minutes, the captain observed that the smoke had dissipated and he was informed that passengers had opened the over wing exits and were standing on the wings. ...