One of the funniest things I’ve ever seen Robin Williams do was his 2-hour interview with James Lipton on Inside the Actors Studio. He was funny as always and honest about some of his struggles. If you can find the full interview, I highly recommend it, but I’ve pulled some “best of” montages off of You Tube including the “scarf incident” that is one of the best bits of improvisation I’ve ever seen.
Killing Time 