Weirdest Christmas (well boxing day) ever!

Had a lovely Christmas day visiting both daughters, one for breakfast and one for dinner plus trip midday to our friends pub - wonderful. However, boxing day - I went to shops for a few bits leaving my (perfectly normal and healthy 60 year old) husband having a wash. I returned a couple of hours later to find him wandering around the house not knowing what he had done for the last few months, saying he thought he had a blackout and continually asking me if it was boxing day as his watch showed 26th December and when I said yes, he asked what we did Xmas day as he couldn't remember. He couldn't remember having worked for the past few weeks, the fact that we took the 4 gc to the carol service at the cathedral Xmas eve (but he remembered he had gc). The whole thing was very worrying so I phoned 111 and when the doctor phoned me back, she said based on the information I should take him to A & E. It was clear that they feared a stroke (as did I) and they were brilliant at the hospital He passed all the 'stroke tests' but kept repeating the same questions time after time - not aggressive or even particularly anxious, just confused. They admitted him to the ward after the CT scan and said they would keep him in overnight and he would have an MRI scan plus ecg and various blood tests. By the time I left at 7 pm he was starting to get his memory back but it was patchy. Told yesterday when I picked him up that it was definitely TGA (Transient Global Amnesia) and it shouldn't happen again and that there is no known cause. He's fine but shaken up (understandably) - has anyone here heard of this or knows someone who has suffered it??