Some of the original cast returns, while others -- wisely, perhaps -- stay out of the way of this direct-to-video sequel to the effective Tremors. Tremors 2 has both laughs and thrills, like the original, but it is less successful at reconciling these two naturally contradictory responses. Too many of the jokes fall flat, and the horror of the underground monsters is stripped away by the ease at which the characters initially fight them off. Things pick up a bit when the monsters metamorphose into a new form, though, nearly saving the film. Fans of monster movie comedies may find this worth watching, if only just.