The stage name of Rui Carvalho speaks for himself: he is a great son of a bitch, those whose expression provokes envy and a mixture of feelings ranging from incomprehension to pure admiration. It is in this way, in his machine-gun of delicately threaded melodic arguments, that each piece on the Filho da Mãe guitar takes us, in the pride of technique and in the breath that takes us to each note.