You have to commend this seal's gumption. If it was going out, it was going out fighting.
Some people (i.e. the people at the Massachusetts Division of Marine Fisheries and the Atlantic White Shark Conservancy following this Great White as it hunted in Cape Cod just 30ft from the shore) were more impressed by the shark's jump out of the water but we think the seal is the real hero here. According to Metro, this maneuver allowed it to escape, so there's a lesson here for all of us.
Never, ever go in the sea. Ever.