Wow! I had no idea that could happen. Thanks for posting those pics! I drove near the water's edge as the sand was harder there. However, between the water's edge and the entry point the sand was dry and it kind of felt like if I lost my speed things could go bad. Perhaps it wasn't just a feeling.
Cools pics! I need to visit Hawaii sometime. I surf here a lot but I know it is pretty poor compared to what you get over there. Here is a pic from a surf outing today. It was small but better than nothing I guess.