He could be fine. Could just be a TIA. I had "stroke-like symptoms" (numbness on my whole left side that started with a tingle and lasted about 20 minutes). I went to the ER, and they checked me in for tests - blood, heart and brain. I was awake and active the whole time. Got a clean bill of health (except for low ldl), and haven't had any problems since.
If we don't hear something like this soon, though, then it could be worse.