I know and see the "scotoma scintillans" from own experience (but without the "migraine" (headache). Only are some things distorted and some smells strange. And I need extra sleep. Aikido-practice I avoid then.
Hope, that you are not frequent suffering from these.
"Things can be anything" is what comes up in my mind. And "there is so much happening, what can actually mean so much". Each person moves in its own way. And things are distorted in many ways, what doesn't mean they are not happening. And so on. Using words for this is difficult and too narrow in explaining..
Aikido is as much a personal path, as meditation is.
B.T.W. this forum is happening in the future of 01-08-2011 (on my computer)...