They don't happen often, but when they do, WOW you know you are in the presence of a monumental piece.
What I am trying to say is that the artist who has inspired this response in you truly has portrayed the beauty of the scene or the emotional response of his/her creativity through the work of art that you are viewing. It is like an unconscious reaction that has grabbed you and engaged your own emotions.
This is something that does not happen often. But if it does take note of what you were gazing at, who the artist was and try to analyze why. It would be interesting to hear what you found out. Let me know if you care to comment.
Day dreams... shivers....
Either that or a ghost has passed your way.
Till next time, Happy Painting!