I never do!
It is said that Milton Hummason had a huge pile of empty liquor bottles in the weeds outside the Mt. Wilson dome.
I think that if anyone had an excuse for having a drink or two, it was Humason. He wasn't trained in astronomy formally, having started as a mule driver bringing supplies up to build Mt Wilson. He quickly wound up on the staff doing maintenance and the like, and soon became a telescope operator, taking many many plates. He was interested in what was being done there astronomically, and was befriended by Harlow Shapley, then at Mt Wilson, who encouraged him to examine plates of M31 and other data to learn more. The Period-Luminosity law (now Leavitt's Law) had recently become known. (It relates a Cepheid variable star's period to its absolute magnitude and through the inverse square formula is the fundamental way that the size of the universe is known). After much work, he detected some Cepheids in M31, marked them on the glass plate, and showed them to Shapley. He scoffed and said that they were far too faint to be Cepheids, taking out his handkerchief to rub the marks out. "They'd have to be too far away, so they can't be Cepheids". Some years later, Hubble, working with and using plates taken by Humason, made the same discovery and became famous. Hubble was a pompous self-promoter who never gave any credit to anyone else if he could claim all of it for himself, so Humason's role in the data taking, analysis and interpretation went unheralded.
If Shapley had been willing to accept an unexpected discovery, the "Great Debate" between Shapley, who believed that everything out there was in the Milky Way and Heber Curtis, who thought there were separate galaxies, would have never taken place. Shapley, though a great astronomer, is forever known for being on the wrong side.