For a second, there, I myself forgot has he got there. I remembered pretty quickly, but there was a brief "wait, what? How did he get down there?" before I remembered.
I just said in the previous commentary how it's okay for me to make jokes that break the tone down here in the commentary because they shouldn't be read on the first read through, but I find myself not wanting to joke about this. Grace's desire to save everyone and her inability to do so is just sad.