Searchbarred and saw a post about this in the Sharkweek hype thread, but needs further discussion.
I guess I missed the original and just caught the rerun of the special, but damn. Really bummed that they didn't get any footage of it attacking the huge whale lure they made. Also, I don't know why they wouldn't have been recording the footage from the fish finder sonar.
http://dsc.discovery.com/tv-shows/shark-week/videos/evidence-of-a-50-ton-megalodon.htm
Still it was about the most amazing thing I have seen in awhile. Imagine a 70 to 100 foot great white, that can bite a boat in half.