I wasn't even in there that long, but I felt like I was suffocating. My body becomes so irritatingly noisy, so I started breathing at a normal rate, except now my breathing was deafeaning. The sound was so confusing that it made me think I was gasping. Mentally I knew that wasn't happening, but I had to fight the instinct to fight for air. Still, my body reacted and my heart rate was going up, furiously loud. I think I would have eventually calmed down, but the whole experience was just so odd I decided I shouldn't push my luck.