A scary feature of some rare migraines, known as complex, is the similarity of their symptoms to those of a stroke: numbness, trouble speaking, etc. It's basically a variation from the visual aura.
I get these myself on occasion, though usually I only get the more common visual distortion plus pain. The first time it happened, I was terrified; the visual distortion had just about faded away, and I was laying in bed trying to fall asleep before the pain hit, when I suddenly realized the words in my head no longer formed coherent phrases. At first I thought it must just be because I was drifting away from consciousness, but when I got up I was still unable to speak. As I've indicated, not only could I not speak properly, the sentences wouldn't even form in my mind - I'd start putting words together and then just lose track of where I was in the phrase. I've also had numbness in my fingers before.
Every time this happens, it only lasts for about 5 minutes at most, but if you don't know what it is, it can be rather frightening.
Weirdly enough, I've never had trouble with light or noise.