Factual error: Xander puts a load of those sticky bombs on a line of motorbikes outside the bad guy's house. These bombs had a detonator switch, which Xander has. When he eventually sets them off, the motorbikes blow up in the order that he put the bombs on. These bombs didn't have timers or anything on them, so why would they blow up one by one and not all at the same time?
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: Near the end when all the police cars (the ones with blue writing as opposed to green) show up at the castle, some of them are 'Mestska Policie' which means city police or district police in Czech. In Prague these policemen are only responsible for keeping the peace, ie handing out tickets, preventing bar fights, etc. They would not have been at such an important and dangerous raid.
Factual error: When agent Shaver shows Xander the bandage explosive for the first time he tells Xander to stand behind the wall then detonates the explosive while he is standing next to it. Agent shaver states that the explosive is powerful enough to blow a hole in a steel safe or vaporize a human. The explosive doesn't appear to be a shape charge, so the explosive force should have gone in all directions and hurt or killed agent Shaver.
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.
Factual error: In the beginning of the movie where Xander Cage (Vin Diesel) takes the senator's automatic transmission Corvette, he hops in and immediately pulls the shifter as far back as it will go. The shift pattern goes P R N D 3 2 1. If you pull the shifter as far back as it will go you would be in first gear going forward, but he lit up the tires in reverse. It's definitely an automatic - in slow motion you can see there are only two pedals.