Giant, month-and-a-half-long-ticket.
After learning six or so complicated areas of the system and updating them all to work with the new changes, make them all play nicely, etc. I finally got everything working. 95% spec coverage, though no ui tests because I haven't gotten selenium working. whatever, everything's done and works.

Second dev bases her ticket off of mine and continues working. Work elsewhere continues and there's an official release, so we both merge in master. I run tests, everything passes, and go back to working on other tickets.

She finishes her ticket.
We do end-to-end testing, and everything works perfectly. Time for a demo!

She merges in master again, and pushes her branch to two staging servers. (idk why two.)

Demo starts.
We connect to the staging servers, and... none of the UI changes exist; they aren't running the correct code!

So she runs it locally for a demo instead. Two features in my ticket no longer work. She throws me under the bus. She throws me under the bus again by criticising a rake task I scrapped because she wanted to do it. Then again because I didn't update my branch to master and push it before the demo, despite having no reason to. and despite the demo being of her branch.

Then she continues to show off and brag about how she's like the "legend" (senior dev) she envies. QAbuys it.

I'm having an emotion, and it's called anger.