YYAA (1-2/2)
The author of the film (appearing on the screen) is shouting YAAAH... The light comes from four sources being switched at random (this takes between 1 and 8 seconds) by an electronic device.
Each light-change is accompanied by a different voice modulation of the speaker. The film technique makes it possible for the author to exhale for three minutes. The alternating close-ups and half-close-ups are totally unjustified.