[cjameskeller]

Wow, I've had this exact experience, as well! Two or three bad ones, with all the rest consisting of:

- a slight odd taste (this is my "early warning sign"), - then the vision loss (which is so hard to describe, because the missing portion doesn't become black/white/blurry/etc, it's just gone), - and sometimes the tingling fingers.

The worst one, which happened while I was in Spanish class at school, began with those symptoms, but then I noticed I couldn't understand the Spanish instructions on the worksheet we'd just been given, even though I'm usually good with languages. I went to read the English "cheater" instructions on the other side, and my ability to read & understand English drained away while I was in the middle of reading. I felt that something was very wrong at that point, and stood up to tell my teacher that I needed to go to the nurse, but as soon as I stood up, I realized I no longer knew how to transfer my thought into my teacher's mind (not only the ability, but even the concept of spoken language had vanished!) ...So I just sat back down and waited it out.

It is quite the experience...