The Pagliacci joke from Watchmen

"Man goes to doctor. Says he's depressed. Says life seems harsh and cruel. Says he feels all alone in threatening world where what lies ahead is vague and uncertain. Doctor says, "Treatment is simple. Great clown Pagliacci is in town tonight. Go and see him. That should pick you up." Man bursts into tears. Says "But Doctor... I am Pagliacci."
 

Watchmen, Alan Moore 
 

I thought about this joke immediately when I learned about the suicide of Robin Williams. And I was not very original: it went viral. Strange how so many people think the same thing at the same time. Sadly ironic that it is after the fact.