sentences:  The school, in light of the recent events, hires a smart man and author suffering from dwarfism named Dr. David Nelson who goes from school to school to talk to students about sensitivity.As soon as Dr. Nelson walks on stage, Cartman laughs hysterically.At first, Dr. Nelson believes that he would tire himself out but realizes that he has no chance to talk, even after Mr. Mackey walks on stage ordering Cartman to be quiet.