"That's when something happens, something out of the ordinary or just rare and biggish - I usually do some before and after every time I come here for summers. And I figure out what happened in my head, and all the parts and how they affected each other, and whether any of them mean anything that I should worry about or account for later or if it's all temporary, and whether I need to change anything about how I think about things like the thing I'm processing. Oh, um, installing changes is a separate thing, I forgot to list that one, it's like - teaching my brain new tricks, only it's faster than when you're training a dog with treats or whatever."