A Costa ship, the Costa Concordia, ran aground off Italy, tore a big hole in the hull, then maneuvered into shallow water where she rolled over on her side. See the pix in the article, they are no joke - scary.
Particularly nasty is that there are questions about whether the ship had yet held its evacuation drill. Most ships do this either before, or immediately after, leaving the dock at the beginning of the cruise. Parent company Carnival needs to take a close look at Costa management, which may not be doing a good job.