In Interstellar's fighting scene between Cooper and Mann, Mann breaks Cooper's visor with a headbutt. When I saw that scene the first thing that came to my mind was: "Com'on! NASA is not going to make so crappy equipment". Just think about it. Is the momentum of a head enough to break an astronaut visor? If that is so, the visor might break easily if the astronaut stumbles and falls over a rock, just to put an example, and that is a very reasonable possibility in an unknown terrain. Therefore, NASA would make suits resistant enough to cope with the majority of possible accidental scenarios.
One possibility might be that a chemical combined with the cold environment of the planet debilitates the helmet's visor, but I can't imagine how to support such hypothesis.
Do you think there is a strictly scientific explanation for the outcome of this scene or shall we consider it just a theatrical license to bring emotion into the movie?