When Angela and Roy are fighting outside in the street, she's wearing a necklace that has stones on it and a slight "V". Once they come back inside, the necklace has changed to a simple thin choker.
When Roy and Angela are riding in the car towards Angela's home, the car is moving and you can see motion in the drivers side mirror but the trees in the passengers side mirror are motionless.
When Roy gets out of the car to meet Angela for the first time, he leaves the car door open. A few seconds later, it's closed again.
When Roy is sitting in his car waiting to meet Angela and about to give up and drive away, the length of the cigarette gets longer and shorter.
After pulling the things from the pool to dispose of them, Roy goes to take his pills, puts them on the counter and reaches for a paper towel. When he gets the paper towel, the pills aren't on the counter. Then in the next shot they are back.
Roy listens to the Herb Alpert and the Tijuana Brass song "The Lonely Bull" on vinyl record. The track selection is cut two - on this album "The Lonely Bull" is the first track.
Despite the fact that obsessive-compulsive Roy has supposedly been locked in his house for days cleaning every square inch, dirty fingerprints are clearly visible on the door when he finally answers it.
When Roy, Frank, and Chuck are having lunch... Roy tells Frank he's got to fly to Phoenix. Chuck is holding his wine glass by the stem, and in next camera view over his right shoulder, he's holding it by the globe.
When Roy Walker plays the second side of the vinyl record: Frank Sinatra's Greatest Hits! (Reprise Records 1968) the needle is placed on the fourth track which lists the song "When Somebody Loves You" (written by Sammy Cahn and Jimmy Van Heusen). The song that plays out of the speakers though is the fifth one on the same side which is "This Town" (a legendary song written by Lee Hazlewood)
When Roy and Frank return to the house and find that Angela is missing, Roy is caught by Frank walking on his own carpet with his shoes on. The sound of him turning on the carpet is the sound of a wood floor not carpet.
After the first con, the mike is reflected in the car's window when they return to the car.
Roy always opens and closes the door 3 times before finally opening it (making it 4 times) to the person waiting, however when the pizza delivery guy is at the door he only opens it once.