I realize this thread is really old, but I wanted to write this anyhow. Aug 1 2016 1 day after finishing my first 26 mile marathon, I thought a hike the next day would help out my sore legs. So my friend and I set out to hike up angels rest on the Columbia river gorge in Oregon. My friend forgot to inform me that a few weeks before hand he had an icd installed for a heart condition he had most of his life. I was really sore in the legs and it was all i could do to keep up with my buddy. Just as we got to the top of the 2.5 mile hike, his defib hit him. He immediatly went to the ground. Best i can describe is a fish out of water! As he was thrashing around on the ground, his head was hitting every rock in sight. I knew not was going on, so i put my hands on his head to stop the beating from the rocks. I felt the 2nd shock, this one caused him to die, i believe. No pulse, no breath,0 movement. I really was kinda in shock and beside myself! I call 911, they were ready to send out a helicoptor, and were asking if i knew cpr. About that time, it shocked him a 3rd time and brought him back, strange! He asked to give him a moment to rest, then to my complete surprise, we walked off that mountain. I dropped him at the hospital, the EKG had reported everything I had seen. When he came to, I asked him, did you see a bright light and a tunnel? He said, no light but I did see a long tunnel! He survived! Over a year has past, 3 months after the incident I agreed to do the hike with him again, it went fine. Yesterday we went my biking. Less that 5 minutes into riding, he got shocked! This time he stayed conscious. 10 seconds later it hit him again! Still conscious I asked him to describe the pain. Horrible pain! Like getting kicked in the chest by a horse is what he said. I really wanted to call 911, but he asked that I did not! I guess I figured at that point if he died, I would then call them. I like my friend, we have had many adventures together, but now I am scared to do anything with him, I know I am not the victim here, but this is getting tough!