Ratchet & Clank PS4 - Escape The Sewers (HARD, No Helipack, Glitched?)

I like to explore all the side areas of a game map before progressing with the story (it's how you'll find hidden items like treasures in Uncharted, Precursor Orbs in Jak etc.) and so I found myself in the sewers without a helipack, on hard, trying to outrun rising waters. Millions of attempts later I beat this... even with a few time consuming stuff ups in this run. Perhaps there is a glitch in the end.