FOX News has been showing plenty of images of Japanese people behaving in a 'dignified' and 'civilised' manner in the face of almost unimaginably catastrophic conditions and in so many cases, personal tragedy. What you don't see so much of is raw footage like this, of spoiled Americans acting like complete dicks.
This lot obviously hadn't been in Japan long enough either to know that the first instinct of the locals in a disaster scenario is not in fact to steal one's shit, or to know what a tsunami warning siren sounds like. (I don't think it means leave your rooftop position and head down to street level immediately!)
"Cloverfield all over" it might have been, in which case capturing the moment so that future generations can enjoy the clips saved on the mobile phone retrieved out of one's cold, dead, hands, was a potentially selfless act...but it's probably a better idea to conserve battery power. One kid did however seem to think the situation through and judiciously held on to his banana throughout.