Continuity mistake: The Salamancas brothers burn Arturo's body inside his car. When the brothers leave, there is a scenic tree a short distance down the road from the burning car. It balances the shot. When the camera angle changes to a wide view, there are no trees anywhere near the car.
Other mistake: When Jimmy goes looking for the Kettlemans, he climbs up the Sandia Mountains but finds them in a flat forested area. To get to a level forested area in the Sandias, Jimmy would have had to climb all the way to the top, which would be suicidal, because the area of the Sandias he goes into is extremely rugged and steep, plus he goes in there with nothing but a suit. Even the Kettlemans would be insane going that same route with two kids, a tent, and camping supplies in tow.
Factual error: While Jimmy is climbing up the billboard to save the worker, some buildings can be seen in the background such as the TriCore Labs, Embassy Suites Hotel, and the Bernalillo County Metro Court House. This episode is set in 2002 but the Embassy Suites and TriCore Lab buildings weren't built until 2004 and 2005 while Metro Court was still under construction at this time. Even the billboard tower in this scene didn't exist until years after it was set.
Continuity mistake: As Howard and Chuck are in a meeting about their lawyers' premiums going up, Chuck is spinning a pen around in his hand. He stop and lays it down as the woman tells them to not take it personally. The camera cuts to a different angle and suddenly he's got the pen spinning in his fingers once again. (00:10:43)
Continuity mistake: Mike is sitting in a diner as a waitress is walking up to him. The shot is from outside the window and shows the reflection of a mixed race couple walking across the street towards the window. When the shot changes to the waitress coming up and bringing him his drink, there is suddenly nobody in the street at all or around that could have been making that reflection. (00:31:20)
Factual error: Around the beginning of the episode, Saul is entering a Ford F-550 Bus from Sandpiper, but that body style from the Ford F series isn't introduced until 2012+ and Better Call Saul takes place in the early 2000's, 6 years before Saul meets Walter.
Continuity mistake: While James is arguing with Tuco in the desert about the twins the sun changes in several shots.
Continuity mistake: When Jimmy is talking outside the courthouse, pretending to be his secretary, he puts his case on his car roof. In the first shot the white aerial is visible in front of his case. Shortly afterwards it's hidden, either behind or on top of his case, without him touching anything.
Factual error: When Jimmy is dropping his ice cream as he enters Nacho's car, a third-generation Land Rover Discovery can be seen turning in the background. The episode takes place in 2004, but the third-generation Discovery did not go into production until 2017. (00:44:12)
Continuity mistake: When Victor gives the sixth drug loaf under Nacho and Arturo's insistence, the loaf's position changes in two different shots.
Sunk Costs - S3-E3
Continuity mistake: Mike sets a trap to taint a cartel's truck with drug residue. First, he inserts a bag of cocaine in a shoe, then throws the pair of shoes over a telephone wire. His plan is to shoot the hanging shoe so the cocaine powder pours out onto the truck as it passes under the wire. However, when he inserts the drugs it is in the right shoe, but later, it is the left shoe he shoots and has the powder in it. (00:29:30 - 00:38:00)
Visible crew/equipment: When Mike is checking his house for intruders, he quickly opens a closet. When he does someone moves to the back of the closet so as not to be seen by the camera.
Continuity mistake: When James McGill returns from the toilet, Craig Kettleman is rubbing his hands. In the next shot he is holding a cup with the right hand and his left hand is hidden under his right arm. (00:25:05)
Continuity mistake: While talking to Marco, when the bartender asks them if they want something else, James McGill is holding a beer bottle in his right hand. In the next shot the bottle is in the center of the table. (00:20:00)
Factual error: If Chuck had shut off all the electricity, the meter would be moving imperceptibly slowly, if at all. (00:30:31 - 00:34:20)
Inflatable - S2-E7
Factual error: When Jimmy speaks on the phone outside after having represented Mike at the district attorney, a 2013 Kia Soul PS is passing behind him. (00:09:12)
Continuity mistake: In the desert when Tuco and Nacho are interrogating Saul, the sun and sky change half a dozen times. When he is being cut free, the sun is to his left. The next shot it's overhead. The continuity gradually improves as the scene goes on.
Continuity mistake: In the desert, when Bolsa is interrogating Nacho, Nacho looks towards Gus. A shot of Gus is shown with a blue sky behind him, with a few clouds. It cuts back to Nacho and then back to Gus, where the sky behind him is cloudy. The change in the sky happens a few more times throughout the scene, going from clear blue to cloudy, then back to clear blue.
Continuity mistake: Jimmy buys three bowling balls in the second-hand shop and walks out with them in a small carry bag. He tosses three balls over the fence at Howard's car, but then later he is shown in his kitchen with Kim destroying one bowling ball in the same little satchel.
Continuity mistake: There is a shot when Howard's head hits the table after being shot by Lalo, facing both Jimmy and Kim. However, the next shot depicts Howard's body facing the door before falling and rolling over towards Jimmy and Kim. (00:49:18)
Answer: It might be the Panavision cap he wore when directing his terrible commercials.