It was my first stand-up appearance on Letterman and I had to follow the funniest man in the world. #RIPRobinWilliams
1. Of all the remembrances of Robin Williams online last night, the one from former Saturday Night Live star Norm MacDonald is among the most touching.
MacDonald shared an emotional memory of Williams boosting him up when he was a nervous young comic who was about to do his first show on Letterman.