Insomnia

Throughout my life I've endured frequent bouts of insomnia. Like many people, sometimes it happens when I have something on my mind, but often happens for no apparent reason. The strange thing is the time I awake during the night.

More often than not, I awake at 3.33 am. When I spoke to others about this, they said the same thing. Is there something magical about that time, or could there be a scientific reason for it?

Can anyone explain it?
According to some web-sites, it could be due to angel activity!