The air crackles with ionization and you realize that this open beach is not the safest place to be in a thunderstorm. Looking quickly around, you see a large outcropping of rock in the trees. A dark area in the rock appears to be a cave. You seem to have five options.....
CONTINUE down the beach SEEK SHELTER in the cave SIT DOWN where you are and watch the storm Head BACK TO THE BOAT DIVE into the wind churned water and try to swim to where you came from.