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: While Walt is out of his car and arguing with the police officer, there are other cars visible in the far distance behind him. The cars appear and disappear in between shots, there isn't time for them to pass and we don't hear them pass. (00:03:30)
Continuity mistake: When the two guys grab the Ouija board, the 2 games that were on top of the Ouija board disappear instantly. (00:22:30)
Continuity mistake: When Walt throws the pizza on the roof, it lands 5 rows up from the edge. When the camera cuts to on the garage roof, it's only 3 rows up. Also the amount of topping changes between the angles. (00:34:30)
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 Walter takes Junior home from school, at first there are no shadows or sun hitting the ground in front of the garage. In the next shot the sun appears.
Continuity mistake: Walter is pulled over by a cop. Before the stop, the cop car is to Walter's right. Walt looks in his wing mirror (driver's side) and the cop car is to Walt's left.
Chosen answer: It is part of the ritual for la Santa Muerte. It is a sign of humility and sacrifice.
djm