When he leaves, it is very important that I talk to you.
Why don't you go away for a bit?
I'll make him tell me the whole story again.
Just watch his face. Now, will you go hide?
Iago and Othello are talking. Iago is using the conversation to further enrage Othello, telling him that Cassio actually told him he slept with Desdemona. Othello becomes distraught and falls into an epileptic fit.
Now I'll ask Cassio about Bianca, a prostitute. Whenever he talks about her he can't stop laughing.
And when he laughs, Othello will go crazy.
Cassio enters and is informed that Othello is having another fit. Cassio wants to help but Iago tells him it would be better if he stayed away. Iago also tells Cassio that he would like to speak with him later.
Let her die and rot and go straight to hell tonight. She won't be alive for long.
How should I murder him, Iago?
Cassio exits. Iago tells Othello that Cassio will be back soon to speak with him and that he will get the details of his with Desdemona. Iago tells Othello to hide and to watch Cassio's face during the conversation.
He is what he is. I won't say anything negative about what he might be.
Is he sane? Is he losing his mind?
I haven't done anything to deserve this!
Iago tells the audience that he will actually ask Cassio about Bianca, whose persistent pursuit always cause Cassio to laugh. The laughter will drive Othello mad.
The plan works perfectly: Cassio's laughter causes Othello to get angrier and angrier. Othello comes out of hiding and promises to kill Cassio, along with Desdemona. Othello decides, with Iago's help, to strangle Desdemona. Iago will kill Cassio.
And let me kill Cassio.
Desdemona and Lodovica enters. Desdemona explains how much she wants to fix the falling out between Cassio and Othello. Othello becomes enraged by this and strikes her. Lodovica asks if Othello has gone made but Iago refuses to answer, instead implying that there is something wrong with Othello.