I had this happen to me 13 years ago when I was 15years old. I had a sudden headache, light sensitivity, tingling in my arm and I could not speak. Anything that I said was gibberish. I was so freaked out and was trying to read words on signs and it came out as slurred unintelligible sounds. I tried to pray and I could not even form words in my head to pray. Then all of a sudden normal function returned and I felt normal. Since then I've always thought I had experienced a TIA, however I really think it was migraine with aura.