The Daily Show is routinely humorous, but is rarely Laugh-Out-Loud funny. I couldn't find the exact clip by itself, but click this and watch from 3:00 to 6:00.
If you're one of the ten people on Earth who hasn't seen his incredible "Last Lecture," feel free to check it out on Youtube when you can. This is a huge bummer, but he wouldn't want armies of mourners. My best to his family.