Visible crew/equipment: Just after XXX says "There's the bridge" and points, you can see the boom mike on top of the frame. (01:46:20)
Continuity mistake: Harpoon in hand, Xander yells to his driver "There's a bridge" pointing at a railway bridge with characteristic metal archways. "Cross the bridge!" he orders, and they do cross a bridge that is blatantly different, with no metal structure. (01:46:20)
Revealing mistake: When Xander is standing on Ahab he is going about 80 miles per hour - that would make it like going through very strong winds. Yet he has no trouble standing on Ahab and the wind has no effect on him or his clothes. (01:48:05)
Continuity mistake: When Xander switches off the submarine by tearing off its HD, the flame of the rocket wildly varies in intensity and colors in each shot of the sequence. (01:51:00)
Other mistake: At the end there was no way for Yelena to see that Xander had survived the explosion and climbed up on the other side of the bridge. Her line of sight was blocked by the bridge itself. (01:52:30)
Continuity mistake: When XXX is snowboarding down the mountain in front of the avalanche his goggles change from round to rectangular back to round again. The snowboard also changes repeatedly - from red to blue - throughout the entire run. The tops and bottoms of the boards - when high or low angles are shown - are different for both boards, so you see 4 different colors.
Continuity mistake: When Ahab is launched, and XXX and Yelena are running, Yelena's singlet top changes from blue, to white, then back to blue again in different shots.
Factual error: When Ahab is entering Prague on the river, an aerial shot shows it passing Palackého Square and the Slovanech Cloister, which would mean that it's coming from the South. Yet in the final approach to the bridge when XXX is riding it, it's coming in from the North, with the hill at Letenske Sady in the background. This is all a moot point anyway, since the Vltava river has at least 3 small, man-made falls along its path through Prague, complete with intricate and time-consuming lock systems for river traffic, so unless the Ahab could fly there was no way it could even get anywhere close to town.
Factual error: When Xander is snowboarding in front of the avalanche he reaches up and grabs that bar to stop himself. At the speed he is supposed to be traveling he would have been unable to hold on with his mittens on and even if he could, his arms would have been ripped off.
Continuity mistake: When Xander is snowboarding down the mountain to take out the communications tower, there is one point where the avalanche clearly bumps Xander and moves him ahead by about 12 feet. It appears to be a correction in the graphics so that it doesn't appear that the avalanche will outrun him down the mountain, however, poorly edited.
Visible crew/equipment: In the fifth shot of the amazing bridge stunt, an Arriflex camera with yellow cords hanging down from the camera is visible, off to the left of the screen. Also, in the same shot at the beginning of this shot (in the upper lefthand corner) you can see a guiding ramp setting the car to go off the bridge.
Continuity mistake: When Yelena and X are on the roof of the building he's staying at and Yelena tells him "Remember what I said, after you kissed me? Never again. I lied.", the shot just before he kisses her she is wearing bright red lipstick, but the next shot it's clearly gone. Likely to spare X from red lipstick all over his face.
Factual error: When XXX is taken to meet Samuel L. Jackson at the Opera in Prague he is driven to the front of the Rudolfinum Concert Hall, yet he meets Jackson at either the National Theatre or the State Opera House (it's definitely one of the two), which are across town. Also, the Rudolfinum doesn't produce operas, they are only a concert venue and have a big pipe organ behind their stage.
Character mistake: When Asia Argento reveals that she is a Russian agent, she says that she works for the FSB, the Russian CIA. This is wrong, however, the Russian equivalent to the CIA is the SVR, the FSB is more like the FBI.
Plot hole: When Xander is driving onto the bridge, chased by the police cars, we see that there are police cars also blocking the end of the bridge to stop him getting away. How come none of them noticed the ruddy great ramp sitting alone in the middle of the bridge and moved it? It wouldn't take a genius to work out what he might do.
Continuity mistake: When Xander is snowboarding down the mountain to take out the communications tower, he snowboards goofy (right foot in front) to regular (left foot in front) many times. That either means the stuntman is regular footed, or he would have to do a lot of 180's spins, which is impossible to do when there is a giant wave of snow chasing you.
Visible crew/equipment: During the battle in Colombia, Xander jumps over a fence and when he's seen landing, it is clearly a stunt double.
Other mistake: After Xander escapes the avalanche by grabbing the pole, the avalanche is suddenly over. If it was that big of a avalanche it would have gone a lot farther.
Factual error: When Xander is snowboarding down the mountain, trying to outrun the avalanche, he is also at one point being chased by the gang on snowmobiles. According to the USSA World Speed Trials at Boonville, NY, the top clocked speed for a Ski-Doo down hill was 127.3mph, and in Marienville, PA, the fastest time for a Ski-Doo on a straight half-mile oval track was 87.0mph. However, the fastest recorded skiing speed was at The Super G Alpine Ski Competition, which was 85mph (men). Therefore, it would have been impossible for Xander to outrun an avalanche, practically with ease, yet have it catch up to the gang on snowmobiles in minutes, even seconds.
Plot hole: When Xander is explaining how he knew the situation in the diner was a set up he mentions the Wall Street guy reading the financial times on a Sunday when the markets are closed. However Xander just woke up in a diner from a drug induced sleep with no idea how long he had been knocked out, how would he know it was Sunday?
Answer: Xander and Shaver were back at the compound where they first met. The one where Xander finds out that Shaver is responsible for making the gun and darts that were used to knock him out. In that scene Shaver shows Xander some of the cool stuff that he had made, and Xander uses a few items later in the movie.
Rollin Garcia Jr