Ghost Ship (2002)

It's a mediocre film at best, but the opening scene was shocking.

So you're on a cruise, what's worse than an iceberg — right ahead? A wire, right onboard.

The entire ship’s worth of passengers, except one girl, is wiped out in one fell swoop when a wire snaps and slices across a dance floor packed with revelers. It takes the well-dressed folk a few seconds to realize they’ve all been cut in halves and quarters and thirds (depending on height), and when they do, the makeup department goes to work. Only one little girl survives she was a little bit short enough to escape