I saved someone's life once, sort of. It was a very impressive experience for me. I was cave diving with a girlfriend. In a fairly simple cave that we had each dived many, many times. About 100 feet deep. High flow, but pretty routine. We were swimming, not scootering. On the way out, I noticed she was behaving unusually, bumping into the wall, holding the line, flashing her light around. I looked at her closely and saw that her mask was filled with water, and she was not clearing it, and she had her eyes closed. Something was very wrong! I took her by the arm with my right arm. Locked arms with her. I used my left hand to protect her head from hitting the cave celing/wall. As soon as I took a hold of her, she went completely limp and stopped swimming entirely. She was still breathing, but I had no way of knowing what was wrong. I spoke to her reassuringly, "I will get you out of here. I won't let anything happen to you. It's going to be okay." To myself I was thinking, over and over and over "You are not going to die in this cave. You are not going to dive in this cave." I started to exit the cave with her, swimming her along as quickly as I could. I guess we had maybe 500 feet or so to go. 15 minutes. A lifetime. At the end (beginning) of the main line, the flow picked up immensely. I left our O2 bottles and reel that we had used to enter the cave in place (really didn't have much choice) and held her close and protected her head as we got jumbled about through a narrow passage and spit into the cavern. I decided not to decompress since we had been in less than an hour. I took her up as quickly as I thought was safe. At the surface, she began to act normal again, and took off her mask and spoke to me. She said her mask had broken and she couldn't clear it, and she was trying to not cause a big scene, so she was trying to act like nothing was wrong!! When she felt me hold her, she felt it would be best to just go limp and let me take control of everything and bring her out. Thanks for the heart attack!!