Continuity mistake: When at Tuco's house, Jesse is first shown emptying his pockets and then getting everything back, even going as far as showing the clean table at the first timestamp, but when he's back at his car at the second timestamp, he doesn't have his keys, supposedly left at the table. (00:32:23 - 00:43:24)
Factual error: Hydrofluoric acid is so dangerous that no high school chemistry lab in the US would have a thimble full of the stuff around, let alone gallons. While it's incredibly toxic it's also a very poor choice for getting rid of bodies, which Walt would know.
Suggested correction: Walt also has never had to dump a body before. Hydrochloric acid would dissolve enough of the body to make it unrecognizable and easier to move, especially in a proper container where it can be transported. Plus this acid was more readily available to Walt and Jesse at this point in the series.
This isn't a valid correction. First, hydrofluoric acid was used, not hydrochloric acid. Second, just because Walt never had to dissolve a body doesn't mean he thinks it would. He should know as a chemist that it wouldn't. Third, you missed the point that no high school would have hydrofluoric acid on hand. So how can that be more readily available than something common and effective like lye.
Continuity mistake: When the woman is collecting the clothing at the Hi-Lo Mart, the position of the shoes she is carrying changes between shots. In the first shot the toes of the shoe are pointed at the ground, In the second they are aimed up over her shoulder. (00:03:00)
Continuity mistake: Just before Lucy finds Walt, the items she has gathered swap from her left arm to her right. (00:03:20)
Continuity mistake: The name tag for the shop worker swaps sides while she is walking through the Hi-Lo Mart. (00:03:20)
Continuity mistake: When Skyler and Walt are reunited in the hospital, Skyler is holding Walts hand up by his face. As the camera changes angle however, their hands are much lower. (00:05:20)
Continuity mistake: Jesse takes the mask off Badger and throws it towards the camera. In one shot the mask has dropped below the camera, but a shot later the mask catches on the camera (as it's intended to). (00:11:05)
Continuity mistake: Skyler is holding Walt's hand with both of hers at the hospital when she asks what it was that caused him to end up there. Camera cuts and one hand is now on her baby bump. (00:13:25)
Visible crew/equipment: Just as Hank gets given his present at the office, several T marks are visible on the floor. (00:39:10)
Visible crew/equipment: When explaining to Hank and Jr what the doctor thinks caused his memory loss, a light screen is reflected in his glasses. (00:40:30)
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: When Walt gets home, Skyler puts her bag on the sofa and is browsing in the bag with her right arm. Camera cuts and now she's using her left arm. (00:42:10)
Continuity mistake: At the end, Skyler is applying lotion to her arm and her arm is upright. Camera changes and now it's horizontal. (00:42:50)
