Shoot it with the Pepper Grinder to lower the platform so you can cross. You will find a red switch at the far end of a pit. Slaughter all of the Ruins to open the path to the next part.
Click the appropriate button as you are automatically at very low life. Alice The Madness Returns Walkthrough Part 4 – Reassembling The Mad Hatter You will see a brief cut scene then you are thrown into battle against a number of Insidious Ruins.
