Our brain is always active, creating mental contents such as images, feelings, thoughts..
However, some thoughts wander into your brain. They randomly appear out of nowhere and create a distorted view of reality.
Although these thoughts can be intrusive and senseless, our mind is constantly trying to give them meaning.
Just before we fall asleep, the sense-making is radically reduced. The brain enters almost in a "screen saver" mode, throwing at you random sequences of images that dissolve into shapes and colors, almost like it has to sustain a basic level of activity, accessing your memories without permission nor the need to make sense.
Chiara Monfrini