To know what I'm talking about you'll have to do a little experiment.... Go to your bathroom, take some soap and foam up your hands. Make a "bubble" with your index finger and your thumb, then reflect the light from a lamp in the "bubble". After a little while oil-like rainbowcolored patterns will appear. In the beginning, make sure you don't breath or blow on the bubble. In the oil-pattern you should see particle-shapes in various sizes traveling from one side to the other (or to the center). A few might shoot by in a random direction with high speed. HOW do these shapes form ? where do they come from [?] ... To me the whole thing looks sort of like a bubblechamber where particles enter and leave traces, except these particles would be enormous ! When the bubble is filled with colors and particle-shapes, try blowing VERY gently on it. What happens is that the patterns start freaking out ! .. They twist and turn very fast in seemingly random directions ! Could someone please explain why this happens ? .. I can't see how such weak air turbulence could cause movement like that in the soap.