GitHub Pull Request PSA

I was surprised this morning to get a pull request on a GitHub fork I have. I thought it was only possible to submit PRs to the upstream repo. Upon discussing it with the developer in question, I learned that it is part of his normal workflow for collaboration when the upstream project does it's reviews via gerritt. I failed to ask how he did it before he went offline for the day, so when I finished my work, I turned to google and #github for the answer. Google found a lot of descriptions of the plain-jane pull request, but not what I was looking for. It was a #github user that told me to have another look at the pull request form. It now lets you choose not only what branch you want your changes applied to, but also what user's fork. Win!