There were few discernible transient sounds, and it was nigh impossible to associate them with any given clip, so I started to suspect it was just either "overdubbed background noise" or maybe just the sound of 7 or 8 episodes overlaid.
Nope! It's the real deal. At about 7:08, there is the sound of electric buzzing. zzzzzZZZZIP! zzzzzZZZIP! It corresponds to the clip at 10x4 (10th from the left, 4th row down), Mr. Dingle The Strong, when he is being zapped by the martians.
January 8, 2014
"After several minutes, I started to doubt whether the cacophony of sound was truly the real audio output of all the episodes.