Continuity: Near the end of the film, Antonio Banderas calls his friends and holds the phone in his left hand. The camera cuts to Salma Hayek and then cuts back to Antonio where he is seen to have the phone in his right hand.

Continuity: When the fight breaks out in the bar during the opening song with El Mariachi and his bandmates, he motions for them to join him to break up the fight. After he breaks it up his bandmates reappear on stage like they never left.

Continuity: After the boy gets his right leg broken by Christos in the fight scene at Bucho's villa: [1] The boy begins to stand up (straight, without turning his body). In the next (bad) cut his movement should be continued, but he suddenly is erecting in a 360°-turn finalized by jumping in the air to knock Christos down with his foot. [2] If you would look down at him from above the scene, his right leg would describe a clockwise movement towards Christo's face. Look sharp and you will see that it never reaches its aim because the distance between the two men is too long. Before the foot hits its aim another very bad cut is set. In this one his leg would describe a counterclockwise movement, not clockwise as the movement has begun the cut before. To accomplish the motion instructed by this cut, the boy would have had to stop his leg's movement abruptly in the middle of the foot-kick, when the foot has the highest speed and force. There he would have had to fling his foot back where it came from to finally knock Christos down. And all this without having any footing from the ground whilst his jump.

Continuity: After Antonio Banderas saves the boy from the truck, they are walking beside a building. The guitar the boy is carrying flips over with every shot change. First, the strings are facing the boy's leg then the guitar back is facing the boy's leg. It changes 4 or 5 times.

Continuity: When the little boy is giving his fathers guitar to the drug runner it has no strings, but when the drug runner gives it to Antonio Banderas it has a string.

Continuity: In the fighting scene with Antonio Banderas and his two guitar friends, before everybody starts shooting we see the little boy walking around strumming his guitar. In that first shot the strap is crossing the back of his neck. But in the very next shot of the boy, that rope is hanging down almost on his knees.

Continuity: In the bar gunfight scene (where Cheech is the barkeep), Banderas and the bookie from the back room end up on the bar with pistols pointed at each other. Banderas puts his weapon down, then two camera cuts later he puts it down again.

Audio problem: When the kid shows El Mariachi how he plays, you can hear the part that he's not playing because it's a constant sound on one string and he's stroking all the strings at the same time.

Continuity: During the rooftop shootout Hayek has a red and a black shoe on. At one stage you see both shoes in her hands then there's a shot of Banderas and then its back to Hayek and she's taking the red shoe off again.

Continuity: How does Banderas shoot the bad guys falling back off the building? It's impossible from the angle he's at.

Visible crew/equipment: After Bucho's men bring the dead knife thrower back to their ranch, when Bucho enters the limo, the boom operator and boom are visible, reflected in the limo window.

Visible crew/equipment: When Mariachi and Carolina are on the roof, after Mariachi is about to kill Bucho he walks away to climb up a wall. When the shot cuts to him walking up to the wall, slow-mo reveals a shadow of the sound mic on the top right corner.

Continuity: When Antonio Banderas runs over the guy at the end of the big shoot near the end of the movie, the guy getting run over has been replaced with a dummy. You can tell because of how easily it moves and how much it twists. You can also slow the film down to see that the dummy's plastic hand is visible.

Continuity: Why didn't we hear the 18-wheeler come rolling down the street when the little boy was going to get El Mariachi to come with him to get his guitar?  He crosses the street and then the sound appears and the truck appears.

Continuity: When Bucho shoots at the limousine glass when it first arrives, the shot on the window changes around a couple of times.

Continuity: When the knife throwing assassin is after El Mariachi, he throws the first knife at his left arm and the second one at his right hand. Then we see El Mariachi going around the corner, with most of his back out of view, as the assassin throws the third knife at him. A few moments later, we see El Mariachi taking the knife out of his back - it's right next to his shoulder, and it was impossible for the assassin to hit it from where he was.

Continuity: At the very end when his girlfriend picks him up, Banderas throws his guitar ahead of him. But in the next shot it's underneath the car. He had to twirl around to throw it, but it only went as far as the car he's standing next to?

Revealing: When Antonio Banderas shoots the guy with the broken ankle at the beginning of the shoot-out on the roof near the end of the movie, he falls off. Slow-mo his fall and you'll see the air mat he's suppose to land on, it's a huge evenly raised lump in the sand about a foot high and surrounded by white rocks. He even sinks into it when he lands.

Continuity: When Selma is stitching up Antonio after the knife throwing scene, she is seen on the bed putting on a band-aid, then reading a magazine, then tightening the bottle of medicine that she put on his arm. All while Antonio never moves.

Continuity: The number of knives on the knife thrower's chest holder change throughout the scene.