No, not:

“My-my-my-my music makes me so hard,
Makes me say oh my Lord
Thank you for blessing me
With a mind to rhyme and two hype feet
…
You can’t touch this (oh-oh oh oh-oh-oh)
You can’t touch this (oh-oh oh oh-oh-oh)
Break it down
(Oh-oh-oh-oh-oh-oh-oh-oh-oh oh-oh)
(Oh-oh-oh-oh-oh-oh-oh-oh-oh oh-oh)
Stop Hammer time”

I’m referring to the Salesforce Hammer.

The process where Salesforce runs A/B testing on customers production custom Apex to ensure their seasonal releases don’t break your code.

Running 186M Apex tests, TWICE. Once in Production on the current version, then again with the new version.

The video discussing it in more detail and other supported docs are in the comments below.

Thanks to @Andrew Davis for mentioning this in your book, Mastering Salesforce DevOps, which caused my additional research.

Video: https://www.youtube.com/watch?v=F71TtwrfOYU

Blog: https://developer.salesforce.com/blogs/engineering/2013/05/here-comes-the-hammer.html

Salesforce Help Doc: https://dreamevent.secure.force.com/articleView?id=apex_hammer_execution_status.htm&type=0