Revealing mistake: When Wayne has gone to the church for Cassandra and finds out that it is actually the one across the street, he walks across between them. If you look where the sun is coming from, his shadow is actually in the wrong direction when he is between them. (01:18:10)
Revealing mistake: At the pool party, when Ike loses his temper and knocks Tina to the floor, you hear her screaming as he lands 3 punches. When he raises his fists, there's no blood on his fingers. Despite after he drags her into the bedroom, her nose is covered in blood.