Continuity mistake: When Jesse gets the gun, the fold is facing screen left. Camera cuts and it's facing screen right.
Continuity mistake: There is an X on the back of the black Hummer during behind shots. It disappears approximately 10 seconds later.
Green Light - S3-E4
Audio problem: When Walter is berating Jessie at the school parking lot, there is a shot of the back of Walter's head. He is talking but it's clear his mouth isn't matching.
Visible crew/equipment: The camera equipment is visible in the bumper of the jeep in the scene where Walt drops Jr. off (before the pizza scene).
Visible crew/equipment: Near the beginning, there is a shot of the one-eyed toy. The camera is riding on the cart with it. You can see the shadow of the camera in the lower left frame.
Continuity mistake: Walt Jr. throws up the alcohol into the pool and some of it gets on the side walls. In the wide shot this has all disappeared.
...and the Bag's in the River - S1-E3
Continuity mistake: Walt picks up the first sandwich and the plate he dropped. He doesn't quite get everything. The camera angle changes and the floor is a lot cleaner now.
Continuity mistake: Walt is driving down a deserted road singing "A Horse with No Name." You can see the roadway behind him through the hole in the headrest. At first, the road is empty. But then a white vehicle quickly approaches. The camera angle changes and there are no vehicles behind him, but a police car coming from the opposite direction passes and makes a u-turn. When the camera angle is back inside Walt's car, the white vehicle turns out to be the police car that just made a u-turn. (00:01:00)
Continuity mistake: With the camera angle aimed up through the pan, Jesse cracks an egg into a transparent corning skillet. The yolk breaks and starts to run. The camera angle changes to above the pan as Jesse cracks a second egg. Both egg yolks are now intact. (00:16:00)
Open House - S4-E3
Continuity mistake: While at Walt's apartment discussing the purchase of the car wash, there is a painting behind Saul that goes from crooked, to straight, and back to crooked.
Continuity mistake: Walt Jr gets Walt Sr to drink apple juice in the hospital, he takes a drink from a cup that's 3/4 full, then sits the half full cup down. Hank comes in and camera focuses on him. When the camera returns to a wider shot the cup of apple juice is now 3/4 full again. (00:40:35)
Continuity mistake: Mike's car is not visible when Walt breaks into his own backyard. Mike is still there, as you see him hiding behind the corner, and later getting into his car.
Continuity mistake: When Emilio's body crashes through the ceiling and lands on the downstairs floor, there is one huge chunk of carcass that lands on the floor in one piece. When the remnants of the body are shown from a different angle, they have been replaced with numerous, smaller chunks. (00:45:30)
Crawl Space - S4-E11
Continuity mistake: Ted is in his house with Saul Goodman's men. When he beats his head on the furniture after he stumbled on the carpet in attempt to escape and passes out, his legs change position in two different angles shots.
Continuity mistake: At the start, Badger is on a bench talking to another guy. In the background there are people walking around in a park behind them that keep teleporting around or walking through multiple times from the same direction between cuts.
Box Cutter - S4-E1
Continuity mistake: When Gus starts to walk away from where he killed Victor, he drops the Box Cutter, and we see it landing. However, after a cut to the next shot, its position has changed. It is no longer sitting on the line in the floor, and it is pointing 180° in the other direction. We can also see from Walt's shadow that the Box Cutter has moved quite a bit further away from Walt. (00:35:05)
Gray Matter - S1-E5
Character mistake: The actor that plays Walter Jr. is laughing in the scene where they confront Walter about treatment. Hank is reaching for items from the cheese plate and RJ Mitte is trying to hide his laughter. (00:25:30)
Crawl Space - S4-E11
Visible crew/equipment: A camera in a black protective box is visible on the ground in the intersection during the crash sequence when Walt gets T-boned by an SUV. (00:24:48)
Chosen answer: It is part of the ritual for la Santa Muerte. It is a sign of humility and sacrifice.
djm