It takes an effort to create all those new surfaces. I'm led into surprise and the beauty of nature at its most elementary level. Fill the tube with water, and let it drain onto the wide flat head of a roofing nail. The liquid will flow off the nail head in a sheet that thins until it's only thousandths of an inch thick. That's the same way liquid oxygen and hydrogen are turned into droplets in a liquid-fueled rocket.
Surface tension pulls the sheet inward until it closes into a bell shape.
Acetone boils on a thin heated wire. The escaping vapor is shaped by the forces of surface tension to form a lovely periodic pattern of bubble removal.