Here are snippets of the reactions of a demoniac during particular prayers in a real exorcism dated September 24, 2017, that lasted more than 3 hours straight.
Setting: Adoration Chapel
Victim: 20+ yr old Filipina who came from a rural area. During the entire possession state, she spoke in straight English with no local accent whatsoever, as if a native speaker of that language, sometimes she spoke in clear Spanish.
Exorcist: (kneeling before the exposed Blessed Sacrament) O Sacrament Most Holy, O Sacrament Divine, all praise and all thanksgiving be every moment Thine.
Demoniac: (with a mocking laughter) Why are you worshipping that “pan”? Worship me instead. I am immortal and powerful. He just gave you bread, nothing more. (Followed by a growl)
Exorcist: (commanding the demon to worship God) Kneel before His holy presence in the Eucharist, unclean spirit! Kneel and worship Him, your Creator and God!
Exorcist: (instructing all those assisting him to kneel before the Blessed Sacrament with heads bowed) O Sacrament Most Holy, O Sacrament Divine, all praise and all thanksgiving…
Demoniac: (shouting with fury) Do not worship Him! Worship me! He gives you nothing! I can give you everything! I own the world! I own everything in it! I can give it to you!
Exorcist: Holy, holy, holy, Lord God of hosts. Heaven and earth are full of your glory…
Demoniac: (Hissing and cursing) We were there, glorious and immortal. He threw us out of His presence. We did not accept His plan for you.
Exorcist: (praying the Litany of the Saints) Lord, have mercy on us…Christ, have mercy on us…Lord, have mercy on us.
Demoniac: (with a snarled voice and mocking) There is no mercy for you. You are just like us. Rebellious, disobedient, sinnnnerrrrrs!
Exorcist: Holy Mary, pray for us.
Demoniac: (face tightening) No! Stop it! Do not call that woman!
Exorcist: St. Michael…St. Gabriel…St. Raphael…
Demoniac: (a change in the pronoun used by the demoniac from the first person plural to singular) I was more glorious than them. Aaaaahhhhh (in a very furious tone). Call me and I will answer you!
Exorcist: (calling on each of the saints in the litany) St. Joseph…St. Augustine… St. Dominic…
Demoniac: (answering the litany with rage) Sinners! Sinners! Sinners all of them!
Exorcist: From all evil, deliver us O Lord… From all sin…
Demoniac: (jeering) You ask God to deliver you from evil and sin? You love sin. That is why we are here with you. Your sin will all destroy you. In a few years, the whole world will be ours because of you. Darkness will cover you all. (laughing with scorn) Do you not see it and experience it? It is already here.
Exorcist: That you govern and preserve your holy Church, we beg you to hear us.
Demoniac: I will destroy her!
Exorcist: That you humble the enemies of holy Church…
Demoniac: You are her enemies. These priests and religious that serve her. (then started to laugh with scorn) they are all unfaithful. They invited us even in their own houses with the things they do and practice. We will destroy them all from the inside. (then looking with raging eyes on one religious sister who was assisting) Yes, sister, your congregation has nothing of the holiness of your father (mentioning the name of a great saint where the congregation takes its inspiration). We will destroy you soon. We are already inside.
Exorcist: That you lift up our minds to heavenly desires, we beg you to hear us.
Demoniac: You all desire sin more than heaven. You do more evil things. (sneering laughter)
Exorcist: (started praying in latin using the Ritual) Praecipio tibi, quicumque es, spiritus immunde, et omnibus sociis tuis hanc dei famulan obsidentibus: ut per mysteria incarnationis, passionis, resurrectionis et ascensionis Domini nostri Jesu Christi, per missionem Spiritus Sancti, et per adventum ejusdem Domini nostri at judicium, dicas clare mihi nomen tuum, dicas clare mihi nomen tuum, dicas clare mihi nomen tuum, dicas clare mihi nomen tuum, dicas clare mihi nomen tuum…
Demoniac: Satanas! Padre, I know your sins…I will accuse you all at the hour of your death.
Exorcist: (repeating the command) Dicas clare mihi nomen tuum…
Demoniac: Lucifer! You think you worship God, Padre? Humanity worships me every time. They worship me in their movies, their music, and their dances. (then in a whisper) I am there whenever they only please themselves. (scorning laughter). You are wasting your time, Padre. She is ours, the world is ours. Humanity has rejected God.
Exorcist: Prorsus in omnibus obedias! Prorsus in omnibus obedias! Prorsus in omnibus obedias!
Demoniac: (growling voice) How dare you command us? You are just a man. We are immortal! You are just a priest. We are more powerful!
Exorcist: Prorsus in omnibus obedias!
Demoniac: We will not subject ourselves to you! Aaaahhh (as if in terrible agony)
Exorcist: Our Father…
Demoniac: He is no father to you. You do not listen to Him…. Stop that praying!
Assisting Sister: (started singing all joined her) Hail Mary, full of grace…
Demoniac: Stop that! Stop that! Stop that! She is just a woman! Damn you!
Assisting Sister and everyone: …pray for us sinners, now and at the hour of our death…
Demoniac: (growling) That woman never stops praying for you!
Exorcist: (instructing the sister and the others to sing the Salve Regina in latin)
Demoniac: Your queen is no queen to us! But He made her truly the queen! Damn her! Damn her! She destroyed everything!
Exorcist: (called everyone to recite the Nicene Creed) I believe in God the Father Almighty, …I believe in Jesus Christ …for us men and for our salvation, He came down from heaven…
Demoniac: (hissing and shouting expletives) There is no salvation for you!
Exorcist: (repeating that line over and over again) For us men and for our salvation, He came down from heaven…
Demoniac: (in exasperation) Nooooooooooo! Why should he become man? Why not become like us? He chose you over us! He chose you over us!
Exorcist: For us men and for our salvation, He came down from heaven. And by the power of the Holy Spirit, He became incarnate of the Virgin Mary and became man.
Demoniac: (infuriated) He chose her! He chose her to be His mother! Had we known it will be her, we would have killed her in the womb!
Exorcist: He will come again in glory to judge the living and dead and His kingdom will have no end…
Demoniac: (terrified) We suffer, we suffer terribly and fear the day of judgment to come.
Exorcist: Holy God, Holy Mighty One, Holy Immortal One, have mercy on us and the whole world. (repeating 10x)
Demoniac: He should not be merciful to you. Yet, He has shown you mercy. You are all sinners and we will not stop until we bring you to damnation. We will bring many with us to hell!
Exorcist: Oh my Jesus, forgive us our sins. Save us from the fires of hell. Bring all souls to heaven, especially those who need most Thy mercy.
Demoniac: (surrendering but defiant) Noooooo!
Lessons Learned: Jesus is truly present in the Holy Eucharist. The devil recognizes that reality and fears it tremendously. But he sees the irreverent disposition of some Catholics toward the Blessed Sacrament and this gives him the opportunity to blaspheme it just like what some Christians do. Satan indeed is the accuser of mankind before God. He accuses us night and day. Lucifer wants to be worshiped as God and whenever we sin, the devil is emboldened. He is indeed a murderer from the beginning. Our hope is in God. Our Savior Jesus Christ came to save us. The devil is infuriated because of this. The Mother of God and the Saints in heaven unceasingly pray for our salvation. The Blessed Mother’s purity terrifies the demons. The devil will try their best to bring many to perdition. However, no matter how they try, when God stretches His hand of mercy, man will still be saved. Blessed be God! Blessed be His Holy Name! Pray unceasingly.
([This first-hand experience was reported also in Spirit Daily on October 30, 2017 -- http://spiritdaily.org/blog/spiritual-warfare/mailbag-snippets-from-an-alleged-exorcism]