Other mistake: Walt takes new-born Holly into the garage to show her the money hidden behind wall insulation. He enters through a door that doesn't exist in the interior of the house. (00:15:00)
Other mistake: When the bear is falling through the sky after the plane crash, it is shown through its point of view. When it starts falling, a shot of northern Albuquerque is shown but when the bear turns over, suddenly it is facing the east. Eubank Blvd is a major north and south street, is seen in the shot of the north. In the latter shot, Candelaria Rd, which is a east and west street is visible. When the bear spun over, it should be showing Eubank Blvd going south.
Other mistake: Throughout the show, during the into credits, people's names have 1 or 2 letters replaced by green characters to symbolise elements from the periodic table. However, Michael Slovis has the 'Ch' highlighted. There is no 'Ch' on the periodic table. (00:03:20)
Chosen answer: It is part of the ritual for la Santa Muerte. It is a sign of humility and sacrifice.
djm