Everyone is familiar with Jack the Dripper - Jackson Pollock. Pollock literally walked around and over his canvases as he dripped paint on them with a stick.
In the video above Pollock states that he wants to "...express..." his "...feelings and not illustrate them." This is the essence of what has become called 'process art.' A process artist does not have a particular image in mind when he begins a painting. He feels a psychological need to 'act' or convey. The result of the painting is due to a spiritually or psychologically initiated process within the painter. In fact, Pollock compares his style to that of Native American sand-painters. The painting reflects the process, yet the image is often amazingly complex and engrossing and it challenges the viewer to a deeper than normal level of interpretation.
Someone made a short video of the opening. So if you are in a far-away place, here's a little bit of what a NY art gallery opening looks like: