[Muzzle_em]

I can relate.
I was body surfing in Daytona FL.
I thought, "nice surf, bigger than normal waves, this should be fun." I too ended up with a swimsuit around my ankles and lots of seawater in my nostrils and stomach.
I remember rolling and rolling, head over feet and thinking it would slam me head first into the sea bed and I would be a quadriplegic when it was all over. And that wave was nothing compared to the waves in Hawaii.

[Periander]

I can relate

No, you cannot relate. When people say "tidal wave" or "tsunami" they expect a wave, like what you see at the beach normally but much larger. This is a totally false impression. The danger of these waves is not their height but their amplitude. There is no trough behind these crests, not for miles at any rate. The effect is not that of a "wave" but that of a flash flood. The sea level suddenly rises 10 20 30 ft or more and does not flow out again for a long time. The rise causes the ocean to overflow its normal banks and flood onto the land in a raging torrent just like a flash flood. Tidal waves are deadly for exactly the same reasons flash floods are:
1. People underestimate them, thinking they can outrun them or "dive under them" or such nonsense. 2. If swept up by them, your chances of survival are very low. People don't survive 30mph impacts with trees or brick walls. If somehow they don't hit something, they usually just drown.

P.S. If you think that dark blue in the background is the wave, you don't know anything.