Carnage

Once the amount of whisky in the bottle reaches to about 2 inches from the bottom, there are a few more glasses filled that should have emptied it, but instead the whisky continues to remain at that same level in the bottle.

The position of the pieces of wood stacked by the fireplace suddenly changes throughout the film.

The tulips change positions within the vase multiple times prior to Nancy Cowan attacking them, even though nobody touches them up until that point.

At the beginning of the film, just before Alan and Nancy try to leave for the second time, there is a camera visible in the mirror.

After Nancy attacks the tulips in the glass vase, the water sloshes violently for a long time, but after a brief cutaway to show the ringing Cellphone, the water movement has stopped completely.

Michael takes the phone from the vase and a close shot shows it in his left hand as well as Alan's left hand to the right.

Alan's fingers are outstretched.

The camera cuts to a reverse shot, where his fingers are not outstretched.