Out Of Mind, Out Of Sight - S1-E11
Audio problem: When the invisible girl writes "Listen" on the chalkboard, the chalk sound effects don't match the writing for the last few strokes. (They're about a half-second too "early.").
Out Of Mind, Out Of Sight - S1-E11
Continuity mistake: When Buffy finds the invisible girl's "home" in the ceiling and picks up her flute, the position of everything on her bed changes between the initial closeup we saw and the shot of Buffy picking up the flute. Ex. In the initial closeup, the flute is on an open case, while in the shot where Buffy picks it up the case is closed. All the sheet music is in a slightly different position. A cylindrical object appears next to the flute that wasn't there in the initial closeup, etc.
Out Of Mind, Out Of Sight - S1-E11
Continuity mistake: When Xander makes the joke "Maybe it was a vampire bat!" in the cafeteria near the beginning of the episode, a sandwich suddenly appears in his previously-empty hand between edits.
Nightmares - S1-E10
Continuity mistake: When Willow goes down the stairs to the basement, as she reaches the bottom, she goes from looking forward to looking to her right between cuts.
Nightmares - S1-E10
Continuity mistake: When the Scoobies go to talk to Wendall about the spiders, when Wendall says "I don't know what to say about that " he instantly goes from looking forward to looking down between edits.
Nightmares - S1-E10
Continuity mistake: When Buffy's mom first wakes her up after her nightmare at the beginning of the episode, the positions of Buffy's hands, her mother's hand and the bed comforter all change between edits as it cuts from a closeup to a wide shot.
Out Of Mind, Out Of Sight - S1-E11
Visible crew/equipment: After Cordelia wins May Queen, Buffy, Xander and Willow are talking, and right before she walks away, you can blatantly see an on-set light reflector being reflected in Buffy's sunglasses.
Nightmares - S1-E10
Continuity mistake: When Buffy goes to find Giles, who is going through newspapers, she asks him if he's found anything and he says "I don't know." Between shots Buffy goes from looking at him to glancing downwards with her eyes and then looking back up again between cuts.
Continuity mistake: When the earthquake happens at the start of the episode, and we see the Master celebrating, his hands instantly change positions at least twice between cuts. (Sometimes it matches perfectly between cuts other times they're in an entirely different position between cuts).
Continuity mistake: When Buffy stakes the first vampire at the beginning, in the first shot, his hands are in towards his abdomen. When the camera cuts behind him, and he falls back, suddenly they're instantly extended partially outwards to either side.
Continuity mistake: When Cordy stops kissing her boyfriend and says "What was that?" at the beginning of the episode, the lighting on Cordy's face changes completely as it cuts between the two camera angles. In the first angle, the lighting is much darker and shadowy, while in the second angle, her face is suddenly much brighter.
Out Of Mind, Out Of Sight - S1-E11
Continuity mistake: After Buffy cuts herself out of her chair, she unties Cordy's left wrist. The scene cuts away to Giles, Xander, Willow and Angel. When the scene cuts back to Buffy and Cordy, suddenly Cordy's wrist is tied again. There's no indication that it was retied in the meantime.
Out Of Mind, Out Of Sight - S1-E11
Continuity mistake: When Cordy and Buffy are tied up, at one point Marcie the invisible girl punches Buffy. As it cuts from a closeup of Buffy back to a wideshot, the position of Buffy's head and the expression of her face instantly changes between cuts. She goes from having her head crooked with a pained expression and her eyes half-shut to having her head straight with a shocked expression and her eyes wide open.
Out Of Mind, Out Of Sight - S1-E11
Visible crew/equipment: When Giles, Willow and Xander are trapped in the storage room with the leaking gas, at one point you can blatantly see a massive set-light reflected in Giles glasses. (This is fairly common, as often lights are reflected in his glasses, but it's particularly noticeable here).
Out Of Mind, Out Of Sight - S1-E11
Continuity mistake: When the invisible girl pushes Buffy, and she falls through the ceiling and onto a table, the position of Buffy's arms changes slightly between edits when it cuts to a high-angle shot of her knocked out. Some of the debris around her also changes position.
Out Of Mind, Out Of Sight - S1-E11
Audio problem: When Cordy and Buffy are talking and Cordy says "Well it beats being alone all by yourself, " pay attention. It's clear that part of the line was dubbed in, as there is a very hard cut between the words "Well" and "It."
Out Of Mind, Out Of Sight - S1-E11
Audio problem: When Cordelia wins May Queen, the clapping sound effect doesn't match the students clapping in the slightest. It's far too loud considering it's a small group outside, and continues on for about two seconds after the students clapping.
Out Of Mind, Out Of Sight - S1-E11
Visible crew/equipment: When Angel and Giles talk in the library, in multiple shots you can see stage lights and light reflectors being reflected in Giles' glasses. (This is actually fairly common in many of his scenes, but it's particularly noticeable here).
Out Of Mind, Out Of Sight - S1-E11
Continuity mistake: This is subtle and hard to notice. When Buffy is explaining that something bumped into her in front of the school after Giles explains what it's like to be touched by a ghosts, pay attention to Xander. In the first shot, he's standing about two feet back from Buffy and his left shoulder is behind Willow. In the next shot he's suddenly much closer to Buffy and Willow is no longer in front of his left shoulder.
Out Of Mind, Out Of Sight - S1-E11
Continuity mistake: When Harmony is pushed down the stairs, she suddenly goes from in front of to behind the garbage can at the bottom instantly between cuts.
Chosen answer: Angel is saying that he is still jealous and Buffy recognizes that this is his way of saying he wishes that they could be together. That is why they both smile.