It was scary. x___x; This was the first one I've ever had.
I saw a flashing light in a zigzag pattern for 10-20 minutes. Apparently that's a sign of a migraine.
It went away though soon after my mom made me lie down in the dark with no noise and a wash cloth over my eyes.
I remember it used to be on TV when I was younger but it never appealed to me much :<
I've considered going back to watch it, but there's so many other awesome animes I'm planning to watch that I don't think it'll be happening anytime soon