[NittanyLion]

Surfers regularly surf waves 15 to 20 ft. or higher. They are able to do this by avoiding the impact zone by diving under it. People on land can avoid the impact zone by running to higher ground, going over the impact zone.

Yes, but in those cases the idea is that you dive through the wave and come out the back side. These waves have no back side to speak of; they're literally a wall of water.

[monday]

"Yes, but in those cases the idea is that you dive through the wave and come out the back side. "

NO. The idea is to dive under the wave. You cannot dive through a wave of that size even if it isn't a tsunami. You must either get over the wave by going to higher ground, or get under the wave by diving under it.