I often find this happening while reading something interesting (anything: Mathematical proof, any novel, article, etc.)that brain gets to its excited state and even if it wants to keep going, it wants to stop for a while and says to itself: ‘I don’t want to know more but just think more, to take a pause and reflect and not finish everything in one sitting. But mind still keeps reading until everything is over. This is an interesting dynamic and self-conflicting convergence.