Thanks for the additional suggestions and details, Will and AMM. I will make him watch Pulse, Amityville 4, and This House Possessed to see if they jog or clarify any memories.

Talked to him yesterday and gleaned some more details. The issue with the garbage disposal is supposedly prefaced by the conversation of the neighborhood kids in the beginning. They are saying that a piece of metal shot out of it and drilled a previous occupant of the house right through the eye. He also told me that at the end of the movie, the house has caught on fire and the garage door jams as they are all going to leave, necesitating the climactic drive through the door, and the house is burning up and/or exploding as they are getting away.

Who would have thought a freak typhoon would have come out of nowhere and wrecked all calculations?