At #nttw10, Callie Holmes' presentation was titled "Computer says no", which led me to "Little Britain" videos, and I think I will reuse it in the #digipres world for repositories that reject invalid files.

https://inv.nadeko.net/watch?v=x0YGZPycMEU

(If you want to know what the presentation was about: https://digipres.club/@joshuatj/117450117880410717 )