Notice the quick change of topic at the debate.
http://www.nytimes.com/2016/09/27/us/politics/transcript-debate.html?_r=0
This article came out a few days later and his blue curtain comment made sense.
Sunday, September 11, 2016
http://www.bobbyanding.com/2016/09/hillarys-behind-scenes-tirade.html?spref=fb&m=1