Continuity mistake: At the start, Chris' hat is all yellow instead of yellow and black. (00:00:30)
Continuity mistake: When Lois is talking to Brian about having homicidal thoughts, the rug colours swap order. (00:14:20)
Audio problem: When Peter is telling the guys about the doctor visit, he starts crying and knocks his beer glass off the table. It makes the sound of glass shattering, but the glass on the floor isn't broken at all.
Continuity mistake: When Lois opens the door to Peters mum, Peter appears at the door and Lois simply vanishes. (00:05:00)
Character mistake: In "The Drunken Clam", while Quagmire and Joe are playing table tennis, a poster on the wall incorrectly spells "Pawtucket Patriot ale" as "Pawtucket Patrtot ale."
Continuity mistake: When Meg's boss tells her to fire Peter, he has plungers on his nipples. He walks over to Meg and takes them off. A second later his shirt is tucked in without Peter being able to tuck it in. He's holding plungers in both hands.
Revealing mistake: Right after the "Ghost Whisperer" cutaway, while Peter, Chris, and Lois are sitting on the couch, Chris' eyes disappear for a single frame.
Continuity mistake: The gun in Peter's first cutaway vanishes when the stage goes dark.
Continuity mistake: One of the ping pong balls that fall off Peter vanishes when it hits the ground.
Continuity mistake: Stewie and Brian shoot themselves in the foot. Next shot the holes have disappeared.
Continuity mistake: All the army men including Brian and Stewie have USA symbols on their arms, but when Stewie and Brian talk to one of them, after they shoot each other in the foot, the USA symbol on the man's sleeve is orange lines and a arrow.
Whistle While Your Wife Works - S5-E5
Other mistake: When the guard is turning the vault handle, the handle doesn't move, but the guard's arms do.
Whistle While Your Wife Works - S5-E5
Continuity mistake: When Lois is helping Peter get his work done while he has the hand injury, Peter gives Lois the flip book to proofread. During this scene the phone power cord appears then disappears, and the door knob as well as the kick plate vanish then reappear properly.
Revealing mistake: As Stewie is walking toward Herbert's house, he just suddenly appears mid-screen.
Chick Cancer - S5-E7
Continuity mistake: Just before Peter announces his decision to make a chick flick, the tissues on his lap change position.
Barely Legal - S5-E8
Continuity mistake: When Meg is introducing Brian to Meg's friends, they are at the mall sitting at a table with trays on it. There's a close-up on one of Meg's friends, and the trays and food are gone.
Barely Legal - S5-E8
Continuity mistake: When Peter, Quagmire and Cleveland become cops because Joe trains them and they are all at Peter's, Joe has binoculars and is looking across the street and saying he is watching his wife Bonnie in her house. In just about every episode it is stated that Joe and Bonnie's house is right next to Peter's. So why is he looking across the street when their house is next to Peter's?
Barely Legal - S5-E8
Audio problem: Just after Peter graduates from the Police Academy, he goes home to Lois and draws his gun in the kitchen, which gets Lois very excited. Every time Peter fires his revolver, you'll hear a soft, but distinctive clink briefly after each shot. This clink comes from shell casings hitting the floor, which revolvers make impossible. Revolvers are designed to eject expended shell casings only while its user is reloading, not after each shot is fired. Only semiautomatic firearms immediately eject expended cartridges immediately after having been fired. Unless I'm mistaken, the entire gunshot sound originally came from a 9mm semiautomatic pistol.
Barely Legal - S5-E8
Revealing mistake: Every time Cleveland's tub slides out of the house, there's never any plumbing attached to it. It just sits on top of the floor so it slides out easily. In this episode its very easy to see.
Chosen answer: It's a real song called "Elvira". Originally by Dallas Fraizer in '66, however, this version seems to be the Oak Ridge Boys cover version. However, the mega lesbians skip the verse and just sing the chorus after the opening line.
Bishop73