Young Christian's Penthouse magazine goes from closed to open between shots.
When the award is first shown, it is on a clear base. When Sean breaks it up, it has a wood looking base. Then when pieces are discarded, one piece is dropped in hallway and it has a clear base again.
When Dan reveals his bitten off fingers it shows his pink and ring finger missing, but when t flashes back to when he was a child he clearly bites off his other two fingers.