Did you know that Buster Keaton and Samuel Beckett collaborated on a film together? No, me neither, but as I discovered over at Pretty Clever Films, they did, in 1965.
The result, called Film, was undoubtedly the strangest entry in the Keaton canon. I won't explain it to you—because I can't—but it has something to do with Bishop George Berkeley's philosophical idea, "esse est percipi" ("to be is to be perceived"), proposed in 1710, which I think means that there is no objective reality, only our perception of reality, and that apparently when we leave the room and stop perceiving it, reality dissolves back into the dew of our ideas.
Or something like that. I'm strictly "a chair is a chair whether I'm there or not" man, myself, so I don't really buy into any of this. But there's a bit in the middle of the film involving Buster, a dog and a cat that is definitely more Keaton than Beckett, so I found this 17 minutes worth watching.
You may decide otherwise.
Appropriately, the film was completely silent.