Up until this point, I've known "25 Minutes to Go" as a Johnny Cash song, and I just assumed he (or another country music artist) had written it. But no, it was written by none other than Shel Silverstein. Some link-clicking confirms that he also wrote "A Boy Named Sue," another song made famous by Mr. Cash.
I mean, I'm surprised but certainly not shocked-- I of course identify Mr. Silverstein with the books and poems that I loved as a kid, but I'm also acquainted with his short plays for grown-ups and some of the work he did for Playboy. I think what's really surprising for me is that he was active in the 60s; I just assume that anything I liked as a kid was made in the 80s or later.
Wikipedia, once again you crack my fragile reality wide open.