Revealing mistake: When SpongeBob is telling King Neptune how much of a jerk Mr. Krabs is, when SpongeBob says, "I am 100 percent man," he leans back and you can see his hat is just floating there. (00:22:25)
Suggested correction: If you mean that it stays on his head, you do realise that they are underwater? It would stay on his head.
Even though they're underwater, everything else stays on the ocean floor level. Therefore, the hat shouldn't stay on Spongebob's head. It should fall off it and hit the floor.