Continuity mistake: When Scarlet dances face-to-face with Mike, her left hand moves from his shoulder to her side so as to move Mike's hand up on her back, but Scarlet's left hand goes back and forth instantly a couple of times, between shots. (00:56:15)
Continuity mistake: Before Scarlet's date arrives, during the dance when Mike spins her in his arms, in a few shots Scarlet's hands are atop one another on Mike's shoulder and her bracelet is at her wrist, but in-between those shots in one shot her hands are apart gripping his shoulder and her bracelet is up on her forearm. (00:56:45)
Continuity mistake: When Alex walks in on Mike dancing with Scarlet, in the background Alex's arm is out as he turns off the stereo with the remote and then puts his hands in his back pockets in close-up. Then two shots later, Alex's hand with the remote once again points to the stereo and then puts his hands by his back pockets. (00:56:55)
Continuity mistake: When Scarlet leaves with her date, Mike is holding her bouquet of flowers and the direction they face changes between the front and back shots - note the two tall purple Liatris flower heads. (00:58:30)
Continuity mistake: When Alex freaks at Mike for staring straight at the girl he has a crush on, he fully opens his eyes. They are normal in the next shot as he talks to Mike. (00:59:20)
Continuity mistake: When Alex and Mike are talking near the beginning of the party scene, Alex burps and puts his fist to his mouth to excuse himself. It is by his side in the next shot. (00:59:20)
Continuity mistake: When Alex and Mike are at the bowling alley, after Mike says, "Any girl in here would be lucky to have your attention," Alex's collar is either up behind his neck or lying flat in the following shots. (00:59:35)
Continuity mistake: At the bowling alley, when Mike is with Maggie's three friends and speaks to the "too flexible" girl, her left hand is either on Mike's shoulder or not, depending on camera angle. (01:00:30)
Continuity mistake: When Mike is comforting Maggie because of her breakup with Stan, the position of Maggie's hands, head, etc keep changing abruptly between shots, and the proximity between Maggie and Mike changes as well during their conversation. (01:08:00)
Continuity mistake: When Maggie is crying, at one point Mike puts his arms around her. In the next shot his hand is on his head. (01:09:00)
Continuity mistake: When Maggie is crying in the bleachers, a large lock of hair from her ponytail keeps appearing and disappearing from her shoulder. (01:09:15)
Continuity mistake: When Mike comforts Maggie after her breakup with Stan, when he stands up and says, "I wanted to invite you to my party...," Mike holds his backpack in his left hand just before it cuts, but next shot his empty left hand is up near his face. (01:10:00)
Continuity mistake: After comforting Maggie when she was crying, when Mike invites her to his party she is standing with her arms down by her sides, but in the next shot when she says, "Yes, I would love to," her arms are instantly crossed in front of her. (Visible on DVD fullscreen.) (01:10:05)
Continuity mistake: During Mike's victory party, at one point you can see Mike in the back holding up a lightsaber. In the next shot when he says "Don't touch the toys," it is now down by his torso. (01:10:50)
Continuity mistake: At the start of the scene in the restaurant, when Ned's wine is served Jane's menu is flat on the table. When Ned starts smelling the wine she is holding it up instantly. (01:11:10)
Continuity mistake: At the restaurant, after Ned does his wine tasting, when the waiter pours wine into Jane's glass he holds the bottle in his left hand, as his right hand holds the cloth napkin, then lifts the bottle away from the glass when he is done. Next shot as he still pours wine in Jane's glass, the wine bottle is now in his right hand as he holds the base of the bottle with his left hand. (01:11:35)
Continuity mistake: During Ned and Principal Masterson's conversation at the restaurant, after Ned tells her, "I'm the kind of guy who spends ten grand on Gandalf the Grey's quarterstaff from The Two Towers," Principal Masterson's hands are clasped on the table in front of her, but in the next shot she is holding the menu up in front her. Next shot the menu is on the table, but then up in her hands once again. (01:12:05)
Continuity mistake: In the shot just after "Mark" tells Scarlet about Alex and the new girlfriend, Nicole (at the victory party), we see Jane's car driving down the block (towards the camera) headed to Ned's home and there are multiple black tire tracks (burned rubber) on the road at the intersection. After a close-up of Jane and Ned in the car discussing 'Halo', it cuts back to the intersection as the teenagers cut them off, and the tire tracks are gone. (01:16:50)
Continuity mistake: Just after "Mark" tells Scarlet about Alex's new girlfriend at the victory party, there's a shot of Jane's blue car (headed to Ned's home) as it nears the intersection, which is a short distance away. It cuts to an interior shot of Jane and Ned in the car discussing 'Halo', and through Jane's open window we see the distance she is driving and the side street view. It then cuts back to the shot of them nearing the intersection and two problems arise: one, in the close-up they drive a far greater distance than they do between the exterior shots, and two, the view outside Jane's window differs as well. (01:16:50)
Continuity mistake: When Principal Masterson and Ned are driving to Ned's house, just as they are driving behind the teenagers, in the interior shot from the POV of the back seat the rearview mirror is gone from the windshield, yet it is visible in the previous and following shots. (01:17:05)
Answer: I've not seen the movie, but an ex-wife would be closer to her ex-husband than a coach to his old student, no matter how good.
JonTheRandom