The tsunami footage was particularly impressive. It was quite fascinating that they discovered the reason the 30-foot sea walls failed to contain the 30-foot tsunami was because the earthquake had lowered everything 3 feet. There was also footage from an American in a park somewhere in Japan filming the ground pulsing open and close beneath his feet.
I just finished watching it (slow day at work) and I think I pretty much sat here with my jaw on the floor the entire time. The footage is incredible and I appreciate that everything was explained in a way that was easy to understand. I learned a lot this morning and forwarded the video to friends and family.