When asked, "Who's there?" I said, "It's me," because I couldn't remember my own name.
Also, for short periods I forgot English, my only language. Looking at a simple book, letters looked like gibberish worse than Greek. Another time, listening to my boss asking me to do something, I could not understand what she was saying, but saw she was getting really frustrated asking me over and over while I just stared at her, trying to remember English. All I could say was, "I don't understand," and couldn't explain further. Then I started understanding bits, namely that she started asking me if I just didn't want to do it because I thought I had a better idea and didn't think her way was good, but I still couldn't say anything besides, "I don't understand."
There was a third person standing there with us, and I was feeling like I was going to pass out and my gaze and head would drift up to the sky and get really dizzy periodically, but to my surprise I didn't fall over. I kept glancing at the other person in hopes one of them would recognize that this was abnormal and I needed medical attention, but neither noticed! Eventually my boss pointed at someone else doing it (an extremely simple task a toddler could do), and visually I could comprehend a little what she wanted me to do, so I nodded and headed toward the other worker. At this point, the two who had been with me left, never to know that there was anything unusual going on.