Eventually, Sonic will make his way to the Boss zone - A huge cavern a thousand feet below ground. The walls of this huge spherical domain have been carved out by years of underground streams trickling slowly down its sides settling in a dark pool at the bottom. Several paths lead towards the center, where a tall, rocky pedestal juts up from the murky base. Atop this rests a huge hydraulic platform upon which a dark hunched figure stands dormant. Once Sonic reaches the overhanging straight pathway to the center platform, still leaving about 30-40 yards between, several things happen. First, a mechanical humming and drumming fills the thick, musty air. It is like some machine waking up after thousands of years of hibernation. A few indicator lights below the platform flash and come to life. The dark figure's eyes light up red and it suddenly stands erect. Stones and clumps of dirt crack and slide off of this Boss's massive cast-iron body. Twisting his upper torso from left to right a few times (as if waking up and stretching), the Darkpool Gorilla Boss sees Sonic and does a double take. Slamming the surface of the platform sends a quake right through the rickety bridge Sonic is standing on. Immediately, it starts to give way behind Sonic and the only way is to run forward to the frenzied Boss or fall to death. The hydraulic platform tilts according to weight change and Sonic's first test is to try and defeat the Rock Elemental's Boss suit On this teetering square. After defeating him, the platform sinks down on its piston base and activates two exit balls for Sonic to choose between.