Syfy Opening: a scene of pointless death and/or violence that is designed to showcase the title creature/event in the opening.
Why do they do this? Because most of these films are too low-budget to feature the monster/disaster effects for more than a couple minutes at a time. As a result, they give you one good part in the beginning...followed by nothing for at least thirty minutes in.
* Rock Monster features a pointless scene of the creature forming and killing someone.
* Sabretooth features some hikers getting killed by the mosnter. Hurray.
* Cyclops features the creature stomping into frame, killing two guys and leaving.