I think that I forgot to mention, when I was talking about my Saturday morning with migraine aura, that there was a very strong smell of enamel paint or some other type of chemical solvent near one side of the track. It was so strong that I didn’t want to breathe through my mouth on that half of the track. I wonder if this contributed to the migraine? I probably shouldn’t have stayed, now that I think about it. Live and learn.