At the beginning of this one-minute YouTube video, we're rooting for a rat stuck on an escalator at Civic Center BART to break free of his endless treadmill of fecal matter. By halfway through, we can't help but wonder if the little guy is actually beginning to enjoy his Sisyphean effort. Either way, here is 68 seconds of a rat running on a BART escalator, which we can relate to:

It's the busker's saxophone warbling out The Beatles in the background that really makes it.

Update: To get some more info on the rat's fate, we reached out to videographer Jon Beilin. Jon tells SFist via email that he "tried to use a book as a land bridge, but the rat was disinterested in dismounting the escalator" and continued to run for quite some time. Take from that what you will, animal behaviorists.