By the time Beothall reaches him, the downed man has been rudely awakened by several preliminary pinches from the sea scorpion's pincers. Now he flails in the sand and cries out for help -- but for some reason, his hands remain pinned behind his back.
"Get them off me! Get them off me!"
One of the sea scorpions continues tormenting him, but the other two notice Beothall, and skitter sideways to defend their meal from his approach. They appear poised to attack you.
Let's skip initiative for the time being, since this combat is just for one PC. Remember, if you want to attack, post all of your rolls, including damage, and I'll let you know if you hit successfully.