Does anyone ever provide answers here? I have the same problem as described above. I'm 63. Over the last ten years or so I have had over a dozen such episodes, usually beginning during a strength training workout in which I work to failure - working very hard to get one more rep. I get fuzzy headed, loose track of thoughts, and wonder if a thought was about something that actually happened or about something I dreamed - as I totally loose the thought. At some point during the episode, maybe 30 to 60 minutes into it I feel like my mind is totally going - then that passes and I am left dull and struggling to remember how to do simple things like use the remote. This lasts for several hours. The next day I am near normal, but less than 100% for a few days. These are always scary and make me wary of exertion.