Today I had a workout. Good one, I'd say. Coming back after having 2 rest days because of a fight. As I was finishing my workout with an abs excercise where I was holding kettlebell in my head and while laying on the floor swinging legs - there was something in front of my eyes. Like, steam.. Not even steam - more like smoke. At first I thought it was because of candle that was nearby, but soon realized - it wasn't because of it. I kept on doing my thing and once again - smoke! In front of my eyes. When I moved my head around and started looking other way - it was gone. As soon as I was just looking straight into ceiling - smoke appeared again. No smell, no taste - nothing. Just smoke. Has anyone experienced something similar to this?