He had an interview with Google and they asked him to invert a binary tree, which is essentially taking a tree of data and swapping the positions of all sibling nodes.

While most people agreed it was a pretty pointless question to ask at an interview, mxcl had a full “don’t you know who I am” shit fit on social media.

Maybe this? https://www.quora.com/Whats-the-logic-behind-Google-rejecting-Max-Howell-the-author-of-Homebrew-for-not-being-able-to-invert-a-binary-tree (his own version of what happened)