Continuity mistake: The foam on top of the drinks Barney puts down at the start changes drastically between shots. (00:01:50)
Band or DJ? - S8-E13
Revealing mistake: When Jason Segal (Marshall) gets blasted in the face with confetti, you can see him squint his eyes in preparation for it.
Revealing mistake: When Robin storms into her room with her gun, she slams the door and the entire wall shakes. (00:20:00)
Factual error: When Ted is having a flashback about the first road trip in the Fiero, which would have happened around 1997or 1998, they are passed by a 2002 GMC Sierra. (00:06:10)
Legendaddy - S6-E19
Other mistake: When Barney is trying to take down the basketball hoop, using the screwdriver, he never actually removes any of the screws.
Other mistake: When Ralph Macchio mocks Barney for not gambling in AC, Barney makes a U-turn to head back, but turns the wheel to the right instead of the left. (00:12:00)
Other mistake: At the end, on the steps in front of Stella's apartment, Stella's daughter stares at the camera for half the shot.
Continuity mistake: When the guys are at the bar before going to the awards show, we see Marshall raise his beer to his mouth twice from different angles, without ever lowering it. Also, the amount of beer in his glass changes instantly between the shots. (00:03:30)
Okay Awesome - S1-E5
Continuity mistake: In the opening scene at the bar, Ted's beer bottle moves from in his hand on his lap to on the table between shots. (00:00:30)
Okay Awesome - S1-E5
Continuity mistake: When the bartender holds up the napkin with the price of the drinks on it, he is holding it straight. The shot cuts to the view from behind, and the napkin is now held at a clear angle. (00:08:50)
Matchmaker - S1-E7
Continuity mistake: In the final scene at the Matchmaker's office, the tub of Haagen Daaz on the desk turns around between shots. Sometimes the brand name is visible, but in other shots the logo is facing away from the camera. (00:20:00)
Continuity mistake: When Ted and Victoria are first talking, the straps on her dress keeping changing position between shots. Sometimes they are starting to slip off her shoulders, sometimes they sit straight, without her every adjusting the dress. (00:02:10)
Continuity mistake: When Barney arrives at the apartment in his Top Gun outfit, we see him hang his sunglasses off his collar twice without removing them in between. (00:05:45)
Continuity mistake: When Barney is pointing out the woman in the blue shirt at the bar, Robin's drink changes from one hand to the other to the bar between shots.
Continuity mistake: In the opening scene at the apartment, the mug that Ted is holding keeps changing positions in his lap between shots. Sometimes it is tucked behind the leg nearest the camera, whilst in other shots it is sat on top of that leg.
Continuity mistake: When Lily and Robin are talking at the apartment, Lily's necklace keeps moving from on top of her jacket to hanging straight down over her dress.
Continuity mistake: When Marshall and Lily are talking in the jail cell they are holding hands, then the shot changes and both have their hands in their laps. (00:17:35)
