Would ocean water cause our cells to swell with more or to shrivel ?

 The cell shrinks

Explanation:   Seawater is hypertonic. If you place an animal or a plant cell in a hypertonic solution, the cell shrinks, because it loses water ( water moves from a higher concentration inside the cell to a lower concentration outside ). So if you get thirsty at the beach drinking seawater makes you even more dehydrated.

wire in brush may conduct electricity from cell to drill and vice versa electrc shock possible