"You train,you raise money. So you walk twenty miles your first day, you sleep in a tent, you wake up I got to do this again?

VOA: special.2009.11.02

But my only criterion is if you talk in your sleep, now that's not allowed because talking is not allowed.

我唯一的要求就是别说梦话,因为我的课上不准说话的

耶鲁公开课 - 基础物理课程节选