When the bomb is set on the cable-car, Greig tells Meg that she has only 4 minutes until the bomb goes off. Yet when one of the terrorists sets the bomb, it clearly says 2.20. Seconds later, the bomb is seen again, only this time the bomb reads 3.45 as if it's counting down from 4 minutes which it clearly was not.
The logo of Matt's ski jacket is backwards when he is climbing onto the gondola.