Complex sentence: Improvisation and the theatre, Johnston reports that the apoplexy and increased shows of deference that student acted out often triggered uproarious laughter in the class which he attributes to a deep-seated human interest in the acting out and renegotiation of status roles.
Split into simpler sentences: Improvisation and the theatre, Johnston reports that the increased shows of deference that students acted out often triggered uproarous laughter in the class. He attributes this to a deep-seated human interest in the acting out and renegotiation of status roles.