Filed under: Friday Afternoon Video -- Robin Williams on Letterman 25 years ago A 1989 clip of Robin Williams appearing on Late Night with David Letterman By Adam J. Morris Aug 15, 2014, 1:00pm CDT Share this story Share this on Facebook Share this on Twitter Share All sharing options Share All sharing options for: Friday Afternoon Video -- Robin Williams on Letterman 25 years ago Reddit Pocket Flipboard Email Mark J. Rebilas-US PRESSWIRE This is a clip from 25 years ago, when Robin Williams appeared on David Letterman...