window about to fall out??
 

On a decently long drive last night I noticed that at highway speeds my drivers window rattles when lowered an inch. Actually, not just rattles, but sounds as if it's about to fly out. Haven't taken the door apart yet, but will do today. Anyone got any ideas? Are there two holdowns on the window at the bottom? It seems the rear edge of the window is secure, but the front edge is bad. Input?? Thanks.