[@Lady Athena] Don't worry, it happens. There's just nothing to stab behind you. Fun fact- in the game, you can actually manage to climb the arm and consistently hit Darkside in the eyes be standing on his shoulders. I never pulled it off myself, but my friend did. (Also, oddly enough, I had an easier time with the beginning of the game on a semi recent hard/expert mode replay than my initial normal mode playthrough.)