Revealing mistake: When Mel Gibson is in Marisa Tomei's apartment he goes to the WC to talk with his "little friend". He just got out of her bed and he is supposed to be naked. While sitting on the toilet he is filmed from the waist up but you can clearly see on the left corner of the screen that he is wearing a dark piece of underwear.
Revealing mistake: When Nick drops the blowdryer, and it's moving in slow motion toward the tub, why is the blowdryer casting shadows on the ceiling directly above the tub? That would mean there are lights either in the tub or on the floor right next to it. (00:29:00)