Vale Robin Williams: Watch what happens when this gorilla asks for a tickle from actor Robin Williams
UPDATE: Tragically, Robin Williams died in Los Angeles today aged 63. He was unquestionably one of the great comic geniuses of our time, but like so many before him, battled demons that were clearly overpowering in the end. He will be sorely, sorely missed. In this video below, we revisit one of his most tender moments, sharing laughs and tickles with Koko the gorilla.