Continuity mistake: When Gus walks towards the nursing home towards the end of the episode, two flags in the background stop waving, but in the next shot they suddenly wave again.
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)
Visible crew/equipment: When Skyler is rubbing oil on her stomach and preparing herself in the bathroom, a camera and cameraman's hand is visible for about a second from the left side of the mirror. (00:10:30)
Visible crew/equipment: When Walter walks towards Jesse's house when he hasn't shown up for work a camera and boom microphone shadow is shown on his back. (00:40:10)
Other mistake: In the famous mugshot of Walter against a height chart, the chart goes up in nice 2 inch increments until 5'8." It then jumps to 6'0", completely skipping 5'10". Did they forget there are 12 inches in a foot, not 10?
Green Light - S3-E4
Continuity mistake: In the scene where Walt is talking to Jesse in Jesse's car, when Jesse pulls out the bag of meth it is in a slide to seal bag. The bag changes between this and a regular ziploc bag from shot to shot. (00:19:30)
Other mistake: Throughout the show, during the into credits, people's names have 1 or 2 letters replaced by green characters to symbolise elements from the periodic table. However, Michael Slovis has the 'Ch' highlighted. There is no 'Ch' on the periodic table. (00:03:20)
Continuity mistake: Mike Ehrmantraut takes Jesse to a house in the desert. He pulls up behind a dark blue car, which vanishes in the next shot, and then reappears.
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)
Green Light - S3-E4
Continuity mistake: When Mike gets out to throw Walt into his car the back passenger door is shut but when he throws him in it's open. (00:08:35)
Green Light - S3-E4
Continuity mistake: When Hank is standing between the ATM and the pumps at the gas station, the shadow cast by the roof over the pumps shifts between shots. The shot from away, taken next to the pole with the Indian logo was taken earlier in the day, casting a long shadow. The other shots have a higher sun which has moved by several hours.
Video ...and the Bag's in the River - S1-E3
Continuity mistake: When Walt is sitting on the overpass it is clear that his car is parked on the part that straddles the median between the lanes, but when the shot is inside his car the view appears as if he is parked directly over the right lanes of traffic. (00:43:50)
Continuity mistake: When Gus is showing Walt the lab, the washer leans forward with one item hanging out. Camera cuts and 2 items are hanging out. This is an instant cut and no time for the item to fall into the position. (00:21:20)
Continuity mistake: When Walt is talking to Saul near the start, we see him unbalance the scales on the table in front of him then lean back. Camera cuts to Saul for a few seconds then shows Walt from behind Saul. In this angle, the scales are now balanced. (00:16:50)
One Minute - S3-E7
Continuity mistake: During Hank's interview, the tape recorder is constantly disappearing and reappearing on the table. (00:15:20)
Continuity mistake: When Walt is being asked by Walt Jr. if he is relaxed yet, Skyler's hand is on Walt's. Camera cuts and it's gone. (00:31:50)
Continuity mistake: When Max Arsinaga is shot, the amount of blood on the border of the pool suddenly increases between frames right before the scene ends. (00:45:05 - 00:45:15)
Continuity mistake: Throughout this entire season, the blue tape holding the new windscreen in place on Walt's car is constantly disappearing and reappearing. This happens throughout several episodes.
Continuity mistake: Just as the camera shows Jessie lighting his crack pipe, there is a TV playing and the screen shows a man with a razor to his hairline. Camera does an instant cut and now said razor is by his cheek. (00:37:20)
Chosen answer: There are several possibilities. Gus primarily does it to make an example out of Victor. Victor is one of Gus' most loyal henchman, and yet he had no problem killing him. Meaning it doesn't matter how loyal or valuable Walt is, he can still be killed and it won't bother Gus. However, Walt tells Jesse that perhaps Victor "flew too close to the sun." Meaning, Victor over stepped his bounds by learning how to cook meth. Gus didn't appreciate Victor's initiative and Gus only wants his employees to do the job they're given. Again, telling Walt and Jesse to do their job or else.
Bishop73
I think it was a combination of anger over Gayle's death and Victor being seen by witnesses makes Victor very vulnerable and therefore a dangerous liability to Fringe's empire.
By this point, the mugshot of Victor will have been spread around as a suspect in Gail's death. Victor had been come too hot to handle, so to say, so had to go.
Ssiscool