@@commandershepard3904 thank you! If you press sprint while in the crouch positions, she'll do that forward roll. If she has crawled forward, press the draw weapon button once to get her into crouch position, then press sprint.
Do you mean the corner bug? You face the corner at 45 degrees, crouch, so you're in the corner, and jump up. I only did it this way as that is the only way to get all the pickups, especially as you're not meant to in this level.