Blooper

In the opening sequence, as Lucy gathers clothing throughout the supermarket, her name tag jumps from her right to her left and back again.

Walt has been in the desert, but his shoes (black hush puppies) on top of his clothes held by the nurse show no signs of dirt, dust or sand.

Skyler's hair on the right side of her face alternates between pushed back and hanging down, depending on the camera angle, in the last scene.

When an IV is inserted, the needle is removed and only a plastic catheter remains. Walt would not have a needle left in his hand and would therefore be unable to reestablish IV access without new equipment. Also, the angle he inserted the needle would have pierced completely through the vein and the IV fluids would not flow through the tubing.

The DEA was looking for who shot Tuco and used the bag of money only as a scare tactic to try to get Jesse to talk. While Jesse likely handled the money found in his car by the DEA at the scene of Tuco's death and his fingerprints may have been on the rolls of bank notes he denied were his, they could not have been used as evidence in the shooting. The presence of the money in the car does not prove Jesse was at the scene or who shot Tuco. Therefore, the DEA would not have wasted time and resources looking for prints on the currency.

When Walt sneaks back into his home to more effectively hide his money, the rolls of cash he places in the A/C vent reflect an unconvincing semi-glossy shine, as opposed to the usual matte texture real U.S. dollar bills have.

Hank refers to Tuco's rifle as an M16, when it is clearly an M4 (or variant), which, as a DEA agent, Hank would almost certainly know.