Continuity mistake: Abner and Helah both have the stone cups that everyone else is using to drink the wine. The scene briefly cuts away, and then in a longer shot, you see Abner holding a goblet. The scene once again cuts back to Abner and Helah, who are now both holding the stone cups again. Throughout the wedding, a goblet makes an appearance in Abner's hand and is then replaced by a stone cup at various points. (00:48:10)
