http://www.youtube.com/watch?v=qBauu1PyOxw

http://www.youtube.com/watch?v=Tw35Ut_sidw

http://www.youtube.com/watch?v=En-6rqZEbIg

http://www.youtube.com/watch?v=7KA9yhRu538

http://www.youtube.com/watch?v=a2JpZCcidIw

http://www.youtube.com/watch?v=fBqQCMoAueU

the megladon vids are the last 2 but the rest are really interesting