I was at Catch a Rising Star one night many, many years ago and he popped in and did a 20 minute set. Was the funniest thing I ever saw. The audience was literally in tears. Peed myself a little.
EDIT: A favorite of mine.
nsfw language.
YouTube: video
Sad to hear that he's gone. Especially that it was a suicide.
I loved him on Mork and Mindy and What Dreams May Come.
...Ohhh, and Popeye!!!