I often end up taking shots of waves crashing against groynes / rocks when I visit the beach.
I call this Lazy Photography.
Set the tripod up with a camera and zoom lens ( 70 - 300 in my case ) sit on a rock or the beach and just press the cable release at the right moment.
Within a short space of time you can have 20 or so different images for practically no effort
Then as the tide goes out ( never do this as the tide is coming in ! ! ) just rotate the tripod head, use the zoom to recompose and off you go again.
It is quite easy to get the timing for the splash but the patterns / shapes cannot be controlled, some are quite boring, many are good but much of the same but now and again you strike lucky, which is what I think I have here
Does it look like a monster emerging from the sea ?