IK've felt it come on many time (what I describe as my "oh S$it feeling) when I'm in the shower and the water is hot. I just figured I was getting overheated. Often happens in dressing rooms and in stores too. Unfortunately I dont have a bar to grab a hold of so I find myself swaying back and forth trying to steady myself and not fall over (a lot like low blood pressure- which i have also). Always wondered if that was a seizure (sp) or not, cause it sure feels like it, just never knew being hot could trigger it. Explains why i feel like that at work (in 100 degree weather with no air conditioning).