If you had to make a choice between running uphill from a shark or letting the shark catch you and having to fight it by hand, but the hill was really steep (we'll say a 45° incline) and very tall (fifteen miles tall) and you couldn't stop running for an hour (minimum 10mph) would you rather do the hour run or take your chances with the shark?

(note, if you cannot run for an hour, you will slide down the hill into the tank with the shark. The tank has metal sides you cannot climb out of. You are equipped with yourself and a tree branch)