Subway Wars - S6-E4
Revealing mistake: When Ted uses his laptop to get directions to the restaurant, Bing shows Los Angeles (where it's filmed) as their current location, instead of NY where the show is set. (00:02:15)
Revealing mistake: When Toby announces that he's moving to Costa Rica, he gets up and goes to hop the fence. He moves out of frame and when the camera goes back to him, he's been replaced by a stunt double, which can be seen as the double's face is visible after he's scaled the fence. (00:17:15)
Revealing mistake: The flags on Tipton hotel you see almost every episode never move; they're animated.
Valerie Hangs With the Cool Kids - S1-E9
Revealing mistake: In episode number 9 of the first season, "Valerie Hangs With the Cool Kids", Valerie receives a call from Juna saying that she is required at the studio for filming. She rushes there, and when she opens the white door to enter the studio, there is a plastic sign on the door saying, "The Comeback". Seeing as Valerie's Comeback show is not solely filmed in the same studio as "Room & Bored", it has to be advertising the real show with Lisa Kudrow, and therefore shouldn't be in shot. (00:22:05)
Revealing mistake: During the "Cribs" segment, when Flonominal is in the hot tub, Riley is behind him moving around oddly, like a paper puppet, as if the creators forgot to animate him.
Revealing mistake: While Hayley is throwing up into the bin, you can hear the sound of it going into the bin. However, you can see nothing is actually going into the bin while she is doing it.
Revealing mistake: During the training montage, right as Mac is about to smash the bottle over Charlie's head, you can see Charlie stop what he's doing about a half-second before being hit, and brace himself for the impact, despite not being able to see it coming. This is confirmed on the DVD commentary.
Revealing mistake: Right after Ignacio tells Andy and Silas to sit down with him at the diner, it's painfully obvious that the baby that Silas is carrying is a doll.
Revealing mistake: When Alex is talking to Rebecca Pope at the end of the episode, we hear Alex say "Now I know more about you than my friends." Watch Rebecca's left eye on the right if the screen when she says, "That's pathetic." Someone did a bad job of editing the CGI and we see a phantom eye over her left eyebrow.
Sweet Johnny - S4-E5
Revealing mistake: The air mattress embedded in the ground that cushions their fall, and the curly hair and face of the stuntman for Earl are quite obvious when Earl and Sweet Johnny hit the ground.
Revealing mistake: Logan gets all the characters to spend spring break at his dad's house. When Zoey finds out Dustin drank all of Quinn's "fratz" she screams his name and runs to go and find him, but despite being meant to be angry you can tell she's laughing.
Suggested correction: Depending on the location settings on his laptop, they could be giving a false reading. My laptop shows I'm in Cardiff Wales while in fact I'm nowhere near.
Ssiscool ★
The show was actually filmed on a film set in Los Angeles which is probably why the laptop says Los Angeles as the current location. This most probably slipped past the editing crew.