This funny clip is oddly chilling. I remembered first watching it back in 1983 on my big new television that I had bought with my writing income (hey, as a teenager, consumer electronics purchases were a great pleasure!) It featured the ingenious Richard Pryor and Robin Williams in a very informal appearance at The Comedy Store:
These two men are both gone now, of course, both having died before they even passed the traditional retirement age of 65. Pryor, who had contracted M.S., died of a heart attack, and Williams by his own hand, dangling from a doorframe in his own house.
Watch the clip for the laughs (and the audience shots, since a lot of famous folks are there) but realize how unexpected and surprising the future always turns out to be.