Considering the divine implications of decapitation as a dream symbol, this might also be a “violent removal from power” for an idol or cultural icon. A person that is a symbol of peace and intellectualism gets ‘morally beheading’.
Naturally, after a detached head has fallen from its ‘throne’ it will float through the air almost weightlessly. This wide-eyed apparition can be taken as an omen of misfortune or very bad timing for the one dreaming about the decapitation.
The negative messages offered by such horrid visions are usually straight to the point and devastating: you must make decisions on your own at once.
Lastly, witnessing a decapitation in a dream is sign of anger and frustration, that the person feels drained from the last unpleasant thing that happened. They are overwhelmed by the helplessness by not preventing heads from rolling.