Transient global amnesia is scary. They say you have an average of 3 in 3 yeears but mine was 3 in 4 years. I just read an article that was called Mind Blowwing Sex it suggests it may have something to do with a nerve below also as mine was caused from (they say) heat or extreme cold. I repeatedly say'"I don't understand. My doctor said if I were driving and had one I would know to pull over and also call my family as I always cry from being scared and don't at the time know what is wrong. My doctor sent me to a nuerologist he couldn't say it was a sizure but said take an 81 mg asprin a day. Some meds can trigger it also.