In the part of the movie, near the beginning when the bad guys are trying to get the box off of Evie and she is fighting them, Alex says something like "Where did you learn how to do that?" If you look closely, his lips don't move at all as he says this sentence.
In that scene, you can't see Alex's lips at all. When he says that line, a bookcase is in the way. So how can you tell if his lips are moving or not when you can't see them?