Other mistake: Right before Barney gets hit by the bus, he's on the sidewalk. To the right there is a One Way sign pointing right, but the bus hits him driving left. The bus would have been driving the wrong way on a one way street.
Suggested correction: Not only is this not a mistake (it wouldn't be the first vehicle going the wrong way down a one way street), but we even see Barney looking in the direction of where the vehicles should be coming from and assume himself to be safe. Had the bus not been going the wrong way, Barney would have seen it coming and not been hit.
This is irrelevant. The mistake is that the bus is going the wrong way on a one - way street. While people do break the law like this, a bus driver certainly wouldn't.
Other mistake: When Barney shows Marshall the video of a dog pooping on a baby, he puts in the CD upside down.
Suggested correction: Lots of blank CDs that you can buy do not have labels on the top and therefore are just shiny on top (like they are on the bottom).
Not true. He points the writing at the camera and puts it writing side down.
Factual error: When Barney puts the CD in Marshal's laptop it's upside down but works. Barney points the label which has writing on it towards the camera as he puts it in the laptop.
The Chain Of Screaming - S3-E15
Character mistake: Marshall, especially as a lawyer, should have known that simply screaming "I QUIT" towards his boss wasn't official resigning. He would have to write a notice letter with his signature in order for his resignation to become official.
Revealing mistake: When Robin storms into her room with her gun, she slams the door and the entire wall shakes. (00:20:00)
No Tomorrow - S3-E12
Continuity mistake: Towards the end, when Ted says, "You just yelled at me", look at Marshall. He's about to take a sip of his drink, but when the camera cuts to a different angle, the mug's nowhere near his lips anymore.
No Tomorrow - S3-E12
Continuity mistake: Towards the end, when Marshall's yelling at Ted, Ted says, "You yelled at me". When the camera angle changes, Marshall's hand changes position.
The Chain Of Screaming - S3-E15
Continuity mistake: When they're all sitting in the car listening to Marshall's story, Robin's ice cream changes between shots.
Continuity mistake: In the scene where Ted goes over to Robin's apartment to yell about their breakup, Robin says "You shaved" and "I liked the beard," implying that this is the first time she has seen Ted since he shaved. But the night before she was in the kitchen at his apartment asking if he was okay with her dating Gael. At that point Ted had already shaved. (00:17:45)
