"Illustration: Man holding Skull"

This is a still from the 1948 film production of William Shakespeare's Hamlet, with Laurence Olivier in the title role.

In Act V scene 1, Hamlet returns home to Denmark and happens upon two gravediggers.  They are clearing space for a new body, and unearth the bones of Elsinore's old court jester, Yorick.  This prompts one of Hamlet's finest speeches:

Alas, poor Yorick! I knew him, Horatio: a fellow of infinite jest, of most excellent fancy: he hath borne me on his back a thousand times; and now, how abhorred in my imagination it is! my gorge rims at it. Here hung those lips that I have kissed I know not how oft. Where be your gibes now? your gambols? your songs? your flashes of merriment, that were wont to set the table on a roar? 

             

The image of Hamlet contemplating the skull in his hand is now so iconic that even Arnold Schwarzegger has parodied it (Last Action Hero).  Pianist Andre Tchaikowsky bequeathed his skull to the Royal Shakespeare Company for use in the scene, and it starred opposite David Tennant in the 2008 production.

Infinite Jest by David Foster Wallace takes its title from this speech.

Oskar plays the role of Yorick's skull, which is to say hardly a role at all!