I went to see the writers of the Daily Show and the Colbert Report do some improv together. There were some mildly famous people, like Jon Oliver and Ed Helms.
Almost everyone was funny, even this guy. He did do this improvised monologue that started off funny, it was about myspace, being mildly famous and dealing with internet wackos, but went into this story about how his dad was actually a dad to like several other kids and after he met all his estranged brothers and sisters one of them turned out to be a scam artist and tried to scam them all one by one. It was a TMI episode, fer sure. We were all left wondering if we should laugh or not... and then the cast did improv based on this.