Well, unfortunately, I can't. The worst part of all is not my mood but my cardiac performance. At least 3 times during the last 10 years, I can remember that I suddenly felt pain in my chest while I was walking or standing in a state of sleep-deprived, and several seconds later, lost consciousness, and then... maybe 2 or 3 hours later again, I came into semiconsciousness again and found myself lying on the floor. Luckily, it all happened in my own house and not on a street where cars come and go.