Felix the Cat in Forty Winks (1929)

A late silent-era Felix, (with a typical shoddy potted-in soundtrack) that's full of fun; the settings and situations keep changing so it's like you get five cartoons in one. The running pants are but a highlight.
The video runs at correct silent speed, with soundtrack pitch digitally re-tuned up a third to avoid that "oogy" sound of a film that's running too slow.