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 Triple X is brought to the diner, he has no jacket on. Later on in the plane, he's got a jacket on. When he's on that farm, the jacket is gone again, but when the raid is going on, he has got his jacket back. I don't know where he's always hiding his jacket, but it must be a really clever place to hide it. (00:12:30 - 00:22:30)
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.
Continuity mistake: When XXX arrives at Yorgi's mansion, there are girls in the water fountain out front. If you watch Yorgi's large bodyguard, the one that sports 5 or so earrings and a large beard, you will notice that he takes a girl out of the fountain. A split second later the shot changes onto XXX and in the background the large bodyguard is seen taking the same girl out of the fountain again. (00:54:55)
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.
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.
Continuity mistake: When Xander Cage is hung up by his arms in the barn, he is hit by a man with his left hand holding a large knife in his right hand. When the man hits him again it is with his right hand, which should have the knife still in it, but it doesn't. There is no camera shot of the knife at all when the man hits Cage with his right hand, so where did it go? (00:21:00)
Continuity mistake: When Xander is chasing the sub, he is driving on a road to the left of the river, yet when he comes onto the bridge, the car does a left turn onto the bridge, which indicates that the car was driving down a road to the right of the river. (01:46:20)
Continuity mistake: When XXX is hanging by his arms in the shed, just before he tells the bad guy he is short, the bad guy is holding onto XXX's shirt. In the next shot of the bad guy, he is isn't holding the shirt, yet in the next shot of XXX, the bad guy's hand is holding the shirt as before. (00:19:45)
Continuity mistake: When XXX first gets on top of the AHAB submarine, he lands on it with a smash and you can clearly see his arm hitting the bubble covering the harddrive, which then is very loose and even opens up for a few centimeters. Next shot we see XXX opening up the bubble by releasing some security handles.