"The supporting actors here are inventions like the PulseGun or the SmartGun, which red-bandannaed Private Vasquez (Jenette Goldstein) stalks about with regally, like a flamenco dancer. (“Aliens” is going to be big on the survivalist circuit. It’s about this point that you remember Cameron also co-wrote “Rambo: First Blood Part II.”). The film may be as empty as it is fast and noisy, but Cameron still has a droll touch with his villains--watch who steps off “Aliens’ ” elevator in pursuit of Weaver--and with amazing mechanical inventions: Here it’s a forklift suit with monstrous lobster claws. (The film’s R rating is for its language and gruesome effects; it’s definitely not for impressionable children in spite of its 9-year-old heroine.)"