When Edie and Susan are in the bar, watch Edie's beer glass. Seen from over her shoulder, it's almost full. She takes a small sip and when the camera cuts to a full-on shot, it's half-empty. Cut back to over Edie's shoulder and the glass is in her hand, almost full again. Cut back to the full-on shot, and the glass is half-empty and sitting on the table, even though Edie never set it down.