"...we hear some wet footsteps, the take must be exterior, it has a certain reverberation, it must be an open place, perhaps at night... then a distant shout, somebody is being attacked in the dark... we hear the shout again but this time longer. At the time it develops, the sound loses reverberation and gains volume to end up being overwhelmed by a round of applause, since in reality it's just the first syllable of a song that someone begins singing in a pub..."

(Where has the camera been all that time? All that information came just from the sound.)