Other mistake: Walter's pants flying in the air defy the laws of physics. The RV is racing forward and the pants somehow find themselves in front of the RV floating through the air. One could say that the pants perhaps flew forward when the RV 'hit a bump' perhaps. However the RV would have to hit a considerable sudden stop to get the pants to fly forward. The RV then runs over the pants which have fallen to the ground from in front of the RV. This could be ignored as somehow possible due to some strange anomaly. Except near the end of the episode. We see the same pants fly off the mirror of the RV flying backwards. Making it impossible for those same pants to be run over from in front of the RV especially due to the speed at which they are flying backwards straight into the camera shot. (00:00:15)
Visible crew/equipment: At the very beginning of the episode where the RV crashes against a rock in the middle of the desert, a camera badly hidden behind a bush can be seen on the right side of the screen immediately after the crash. (00:00:57)
Continuity mistake: When Jesse reminds Walter that he flunked him, he is holding a bottle of beer that is raised to his stomach. When the shot cuts, the beer bottle is lowered away from his stomach. (00:33:20)
Continuity mistake: When Jesse picks up the apron and asks "What the hell is this", the apron is held so that part of it is placed over the top of Jesse's hand. When the camera changes angles, none of the apron can be seen placed over the top of his hand. (00:33:55)
Visible crew/equipment: When Walter talks with Jesse outside the Mesa Credit Union, just after giving him the money to buy the RV, a boom mic pole can be seen reflected on Jesse's car door. (00:36:12)
Visible crew/equipment: When Walter puts the mask over Jesse's unconscious face after drugging Emilio and Krazy-8, in the POV shot of Jesse where the camera is looking up at Walter, the reflection of the camera can be seen in Walter's mask. (00:51:05)
Continuity mistake: Towards the end, Walter throws up on the ground. Long shot shows no vomit anywhere. (00:52:15)
Visible crew/equipment: At the very end of the episode, right after he tells Jesse how he used the red phosphorus to kill the gunmen, Walt leans down to vomit. You can see his microphone transmitter under his shirt. (00:54:20)
Continuity mistake: Emilio and Krazy 8 show up to the cook site to visit Walter. Krazy 8 leaves the drivers side door open when he exits the vehicle. Later when Walt is trying to flee the area in the RV, he drives past their car. The door is closed.
Continuity mistake: When Walt writes Chiral on the board, the writing changes style. Note the C. (00:09:20)
Character mistake: When Walt steals the bottles of "hydrofluoric acid," they are misspelled on the labels as "hydroflouric." This misspelling is corrected when hydrofluoric acid reappears in season 4. This was corrected for some DVD releases but is still visible on some streaming services. (00:11:20)
Continuity mistake: Jesse is applying foundation to his eye to hide the bruising. He is then interrupted by Crazy 8 emerging from the RV. He then runs down to the RV and upon arriving at it, the foundation has covered a lot more of the bruise. (00:11:45)
Continuity mistake: When Jesse looks out the window at the RV, the door is wide open. When he gets outside, the door isn't open as wide. (00:11:50)
Continuity mistake: When Jesse looks out of the bathroom window there is a little curtain across the bottom half of the window. From the shot inside the bathroom the curtain is opened however from the outside it is closed. (00:12:00)
Continuity mistake: When Krazy8 falls to the floor, his position on the floor changes between shots. Notice his right arm in relation to the curb. (00:13:20)
Continuity mistake: When Skyler is looking at Cap'in Cook's My Shout page, you can see the whole page. Camera cuts and now the page has zoomed in significantly. (00:14:30)
Chosen answer: It is part of the ritual for la Santa Muerte. It is a sign of humility and sacrifice.
djm