To this day, this is still my favorite comedy bit.
Robin Williams first appearance on “The Home Box Office”, in 1977:
http://youtu.be/FH7crqRvhhc
http://i61.tinypic.com/2u6dbaq.jpg
One of the great comic minds ever. He could do what Winters did. I saw Winters work items in a staged attic and improvise for 30 minutes. Williams did the same. He would grab a scarf, hat, item from a table and do a 5 minute riff.
His last TV series bombed and his stand up was not up to date. Probably just gave up and didn’t hope any more.