In June 2013, Stephen broke character to remember his mother, Lorna Colbert. "If you also like me, that's because of my mom," Stephen said, and he wanted to tell the audience a little bit about her. After showing a montage of photos and sharing her life story, he described his grief: "I know that it may sound greedy to want more days with a person who lived so long. But the fact that my mother was 92 does not diminish — it only magnifies the enormity of the room whose door has now quietly shut."
Source: Comedy Central