It is definitely a possibility that your glass will pop out of the frame depending on the type of window and frame. There are a lot of other security window laminates other than burglargard. 3M makes a "safety and security film" that is the same thing and they offer a few different frame reinforcement options. One option commonly used is a silicone caulk that adheres the film to the frame to prevent the glass from being forced out in one piece.