Continuity mistake: The Boss kneels by Tasha after hitting her, and asks her did she get the money. In that particular shot, blood trickles down her face in a single clean path, but in the close-up and in other later views part of the blood branches down coasting her nose. (00:39:10)
Continuity mistake: A stripper named Elektra is introduced, walks on stage and begins to pole dance. When she stretches on all fours, do your best to focus on the background instead; at the bar you can see 3 men having drinks. Those are Boris and his associates; it is footage recycled from the part that comes a minute later in the movie, when they leave the office and go see her number. (00:14:20 - 00:15:00)
Other mistake: Ten minutes into the movie, during the credits one character is presented as "Cheno", but in the end credits he's "Chino". (00:10:35)
Continuity mistake: At the gas station, Pablo passed by the 'old man' to go to his 'sh*tter'. He arrogantly blows cigarette smoke on him. The old man himself is smoking, and the cigarette in close-up shows to be burnt to a different degree and pattern than the earlier and following view - which instead match. (00:08:20)
Revealing mistake: Pablo and his buddy are driving through the middle of nowhere, and end up in the bucolic town of Red Stone. The first two people they drive by are armed with machetes. The close-up of the second one is reversed, as shown by the dilapidated street sign - it can't be deliberately shown by say, the car mirror, because they are looking at him turning their head. (00:05:40)
Continuity mistake: When the two criminals seen at the beginning kill the drug dealer, he is initially still sporting his sunglasses, rolled at the back of his neck. When they drive away, the shades somehow ended up in a totally different spot around his midsection. (00:03:55)
Continuity mistake: After the fake movie intro, the two guys drive to a secluded place where their drop is supposed to happen. "Cheno", the one in the driver seat, has the right hand down his side and the left hand on the right side of the steering wheel in a pretty unique position. But in the reverse shot, it's his right hand on the wheel. (00:03:00)