4:48. Sarah's mouth speaking

The human speech organ is the first instrument we use for expressing thoughts and emotions. In some extreme cases, like the clinical depression, some particular states of mind are hard to communicate. The voice sounds mute and the facial expressions are illegible for other people. This brings frustration and forces the depressed person to undertake some violent actions, often against him/herself.
The void attracts and incites to get dissolve in it, leaving behind the narrow and closed space of our mind.