In either case my survival chances at a height of that magnitude (whether it's a slope length or the height of the slope) are slim to nil.
What kind of shark is it? If it's a nurse shark or even a blue shark I might want to fight it. If it's a large great white or a tiger shark I would be afraid of blood loss, even though I wouldn't be eaten. Sharks don't like the taste of humans, but they have to bite us to find out.