165 FT Bell Dive - Dive Partner Falls Unconscious

165 FT Dive using a diving bell in Commercial Diving School. Bottom time was 30 minutes, with about 30 minute in-water decompression time, and about 1 hour decompression in the hyperbaric chamber. My partner passed out when we reached 165 FT, and gave me quite a scare. However, after a quick nudge, he wakes up and is okay. Location: 40 Fathom Grotto: Deep Water Training Center: Commercial Diving Academy Technical Institute.