I have one to share too. That is a horrible flight experience.  The flight was on Northwest and it was from Orlando to Detroit.  Somewhere over Kentucky the entire plane dropped what must have been almost 8000 feet after running through an air pocket quite quickly.  Everyone's stuff went up into the air, people were vomiting, and everyone was either screaming or praying.. At the last minute the plane began to climb and level off.  I know this kind of stuff occurs quite frequently but I think it was the longest I've ever been in practically zero g on a commercial aircraft.  The only comparable situation would of been a flight from LAX to Tokyo where we were over the Pacific and similarly hit an air pocket and fell nose down for thousands of feet.