My eyes don't twitch now, since the posting of the thread. It has cooled down a bit.

Lack of electrolytes - didn't think of that one. I heard somewhere (I think here, actually) that it was a result of drinking lots of water. There'd be a definite correlation between lack of electrolytes and drinking water, though. Maybe I'll eat some chips and a banana after a hard ride. Yay!

I don't drink 'nough coffee or alcohol to warrant eye twitch.