Hidden in the rustling dust

A man brings an exotic spider he bought from a street vendor into his home, it escapes, and soon the entire apartment complex is infested with these buggers. These rapidly reproducing creatures grow to extremely large sizes, are a danger to anything that moves, and are difficult to kill. This French film has a nice dose of terror and some nastiness, but it's sometimes even too chaotic. The characters scream and panic to the point of boredom.