Comedian Mike Birbiglia talks about the time he ruined a cancer charity event, by giving the worst performance of his life. (Here's a hint: He improvised.

Mike Birbiglia talks about the sleepwalking that nearly killed him. (13 minutes)This story is an excerpt of Mike's one-man show, "Sleepwalk with Me," which also became feature film, produced and co-written by Ira Glass.