I've been sitting on the sofa checking fb and have just replied to emzit's thread. I stood up to go to the kitchen and stretched. I started to get pin pricks of light in front of my eyes, then more colours swam in front of my eyes. My head felt funny so I grabbed onto the door. Then I collapsed. I came back round immediately.
What the hell?
My head feels a bit like it does when the weather is close and there's going to be a storm.