Trailer for Dante's Peak

Source/Author: YouTube
Subject: volcanoes
Description: Cheesy, but dramatic CGI of pyroclastic flow.
Duration: 1:22
Comments: The video is not 100% scientifically correct, but it is a good way to start a class discussion about what is and isn't accurate (e.g., I usually start by pointing out that real volcanologists usually don't look like Pierce Brosnan).
URL: http://www.youtube.com/watch?v=O8HNlhVbGzY