In Episode Nine (09), Season Three (03) of the popular television show Better Call Saul, known for its chicanery, a scene includes the song Popcorn as background music:

https://www.youtube.com/watch?v=6ExEAVuMlY8

The song Popcorn was written in the 60's by Gershon Kingsley and released on the album Music to Moog by.

https://www.youtube.com/watch?v=CWbR4kweaFk&t=598s

It has been covered countless times, but the most important cover (to this post and in general) is Neil Cicierega's, Floor Corn.

https://www.youtube.com/watch?v=yVcAyEMM4Cc

Another work by Neil Cicerega is Bustin, a high-quality rip of a song from Ghostbusters.

https://www.youtube.com/watch?v=0tdyU_gW6WE

Ghostbusters is also referenced in the popular video game Fortnite. A skin featuring characters from one of the remake films ) is present in the game.

As we all know already, Fortnite contains a Kelsier set. Kelsier is a character in the Mistborn series of books by Brandon Sanderson.

Through the process of Facts and Logic, we can conclude that Better Call Saul is in fact a Mistborn reference. QED.