A beer bottle is smashed on the rear window of the car leaving the hotel. In the next shot the rear window is perfectly clean.
After the ghosts try to drag Eli out the door, Dr. Horn yells for the nurse to get 20cc of Haldol. Dosages are not given in cc, but in mg, or mg/mL. The standard dose of Haldol (for adults) is 2-5mg.
When Eli sticks his tongue out to prove to his mom that he took the Diazepam, his tongue is stained blue, evidence of previous takes with the fake blue-dyed pill.
During Eli's first treatment Dr. Horn makes an incision along the side of Eli's thigh, requiring the bone bunch to go in parallel to the table, yet Dr. Horn pushes the punch directly down perpendicular to the table and Eli's body.