The video starts kind of slow with some earthquake footage and videos of relatively small waves, but ends with total apocalypse. Entire towns being erased from the Earth. Cities washed away.
There's a river upstream from a coastal city, a seemingly nice residential area, where people seem to have assumed they were safe and went down to the river to see what was happening. At first not much, what looks like a tidal bore, tossing small boats around. You see local police trying to get people to move people away. Then all hell breaks loose, the tsunami sirens cut loose and the river rises from its banks and floods the surrounding residential area. Then the river stops being a river entirely and turns into a monster, into a dark seething wave of rubble as the remains of buildings from the coastal city downstream are forced into the narrow channel upstream.
And to think that Japan got three hits in this one,
1. A huge (mag 8.9) earthquake. (Bad enough by any normal standard.)
2. A huge tsunami (largest in recorded Japanese history) that destroyed entire coastal cities.
3. And to top it all off, a wrecked nuclear power plant that melted down and created international consternation for months.
Too much...
https://www.youtube.com/watch?v=S2ZOmMH4WHA