Other mistake: As Sylvester Stallone explodes the grid to come up in the tunnel, the car on top is like a lightweight car, it seems to be stuck to the ground. (00:45:00)
Other mistake: When the tunnel starts to flood isn't it strange how the man hole Sylvester Stallone crawls out of doesn't fill with water? You don't once see air bubbling out of it or anything.
Other mistake: When Sylvester Stallone is about to drop down from the third fan, he attempts to tie it to the hoop in the middle, but instead ties it to the fan itself, in the following scene, if you look closely at the fan above, the rope is now tied to the middle. (00:42:30)
Other mistake: When the thieves are "escaping" in the tunnel, there is enough space for them to drive fast and cut in and out between other vehicles. This would be impossible because traffic was jammed in and out of the tunnel.
