what happens to bottom?

Finally they start to rehearse the play, with the puck eavesdropping in the background. Each of the actors makes several word mistakes, giving the phrases completely different meanings. The puck leaves when Bottom goes offstage, and reappears with Bottom, who now wears an asses head which the puck put on him. Bottom is blissfully unaware that he is transformed into an ass, and humorously asks the others why they run away from him.