Human cognition is still essentially a black box-- stimuli, filtered through our senses, enters our consciousness, this stuff is invisibly and unexplainably processed in our brain, and thoughts are produced . . . with varying degrees of success, recall, and logic . . . and we can rarely explain the causality of the stream: we can remember and explain some things at the drop of a hat, we have difficulty recalling other things, and sometimes we remember things too late (the French call this l'esprit d'escalier . . . the wit of the staircase) and this video clip of my son Alex captures all the mysteries and emotions of the mind in a mere seventeen seconds-- you'll probably have to watch it twice; I learned more from this clip than I did from all my college psychology courses (which isn't saying much) and it was pure luck that my kids stumbled upon it (they were rummaging through iPhoto, as they have reached the ripe old ages of eight and ten, and now look back upon their youth nostalgically).