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In the Hospital, get to its first floor, and head straight ahead until you reach a pressure plate. Order your companion to step on it, to acknowledge about its functionality. Step onto the lift, and order your companion to step onto that pressure plate again. Once you are uplifted, you must access and activate the located switch there at, in order to open up a gate for your companion to pass through at the correct opportunity. Oder to him, to stand on another pressure plate that is located behind the gate and down some steps. Make him activate it.