In the end, the future Hellboy/master of the dad bod made good on his promise, and the result is a series of photos that any Stranger Things fan would love to immortalize in his or her yearbook.
Oh, and to answer what is undoubtedly your biggest question: yes, the trombone was Harbour’s idea, nay, his demand.
This whole thing started last fall when high school student Damaris Frogo contacted Jim Hopper portrayer David Harbour on Twitter and asked him how many retweets it would take for him to join her in her impending high school pics.
Harbour responded that she would need 25,000 to make it happen, and she easily blew passed that mark, and the tweet has now been shared upwards of 30,000 times.