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After the gap where you have to push a green and red crank to get robin across the gap, there should be a small hole in the floor near the edge. fall through it and you'll see an organ. Use a strong character to move it to the right and hook it up to a pump and keep jumping on the pump until a guy comes over and started playing the organ... the brick should then appear.
I have felt the icy breath of darkness upon my skin, and have been gripped by the skeletal talons of death itself.