Continuity mistake: When Peter enters the cockpit and accidentally kills the pilots the cockpit looks small enough so that it could only fit Peter and the pilots in their seats. However, when he turns around to leave the cockpit looks big enough to fit an entire group of people.
Continuity mistake: When Karen Black is first shown, her blue uniform is sleeveless, showing her white shirtsleeves. After a cut to the "Dawson's Creek" kids, Peter says "It was a movie in the seventies," and Black's outfit has sleeves. Later, when she is helping people off the plane, her uniform once again is sleeveless.
Continuity mistake: When Peter is on the phone talking to Death the color of the napkin on the table changes from red to a brownish color.
Continuity mistake: When Death is talking about how he wanted to be a wood nymph, he has no pillows, but in the next shot, he has a blue pillow.
Continuity mistake: When Stewie shoots the darts at Lois through the straw they get stuck to the cupboard door but in the next shot they are gone.
Continuity mistake: In the 'Titanic' spoof, just as Jack says "Yeah, about that, I was pretty sure I was gonna die", his head and body change distinctly between shots. (00:16:25)
Plot hole: As evidenced by the big bar room shootout, even if they couldn't die in this episode, wounds would still show up on your body (if shot with a gun, there would still be a hole). So, when Peter jumped off the building, when he hit the ground he should have been reduced to a fleshy puddle, even if he weren't dead.
Continuity mistake: When Death is incapacitated and Peter is wearing the Death cloak, the stool that Death's legs are resting upon changes from having purple to brown legs. (00:16:45)
Continuity mistake: During the yard sale, Lois goes outside the house but she doesn't close the door. She talks to Peter and the shot later, the door is closed.
Continuity mistake: Death has the TV remote asking how old the TV is. As Lois talks, he puts it down, then it suddenly disappears altogether.
Continuity mistake: As Quagmire and Cleveland are talking to Peter, the hat Cleveland is wearing disappears and reappears between cuts.
Revealing mistake: Death's right foot disappears when he gets up after he says "You know, my ankle is starting to feel better." (00:21:15)
Revealing mistake: While Lois is unbuttoning her shirt, Death's feet and legs aren't visible on the couch, even though he is lying on it.
Other mistake: Throughout many episodes, it's discovered that anybody that touches Death immediately dies. When Stewie learns that Death has come for Peter, he immediately touches his finger to lead him inside but manages to live.
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