It includes materials that strenghten the mood.
Behind the masks that the different characters wear, some doubts assail us: who is behind them? would it be sweating like crazy or would it be as fresh as a rose? Would it be sad or full of happiness? Would he take the opportunity to have a nap? Or to stick out its tongue to some viewer? or to throw mute verbal abuse or even love kisses? And the most important of them all: if when revealing the face its expression were as the one on the mask, which one of them would remain shocked?