I'm finally back so I can say more about the day. It started well with 3 4BLD attempts that got better each time - not a PB single or mean, but still quite a respectable result, and a good start to the day.
Then I did feet, and got my first average under the new rules, so now I have an average of 5 instead of just a mean of 3. It still feels weird to me to use hands to inspect.

Then i did 5x5x5; my first solve was 3 seconds from the cutoff; my second solve was going really fast, but then I somehow forgot one of the last edges algorithms and had to start over. :-( So no average for me there.
Then 3BLD, where I did nothing spectacular, but still a couple of decent solves. The one DNF was a completely scrambled cube that was in the wrong orientation when I finished - I must have misoriented it in the middle.
After lunch came 5BLD, which was fantastic - obviously the highlight of my day! Everything was just clicking for me, and I knew it was going well. My new PB was the second solve - the same one Stanley set the WR on. It was a little easier than normal, with somewhat better centers than average without reorienting, but it wasn't spectacularly easier than normal. Anyway, it's so good to finally get a 5BLD mean; I've wanted one for over a decade!

Next came megaminx, which was comically heartbreaking - I got a 2:15.21, followed by a 2:15.19. The cutoff was 2:15. !&@*#($*%^
Then came multiBLD - I got 12 of 14. On one of the cubes, I actually fully recalled the corners, then remembered I was supposed to do edges first, so I did those first, then forgot to go back and do the corners. Once I saw it afterwards, I picked it up and closed my eyes and flew through the corners without a pause - I knew it - if only I had remembered to do it! The other one seems to have been a mismemorization - it was off by 3 edges.
Next came Clock. On the second solve, I solved everything pretty fast - would have been fast enough to give me a 16 second average - but then the judge noticed I had solved everything to 3 o'clock. :-( So I had to do a safe solve on the third one when it went badly, so I had a counting 24.
Finally 3BLD round 2. I was honestly fried by this time; I'm happy I got the 1:33. On the last solve I took too long to memorize the edges and so I forgot the corners and gave up. On the first solve, I was rushing and apparently introduced an extra turn somewhere - it was off by 4 edges and 4 corners.
So overall in BLD today I solved 21 out of 26 cubes; not bad! If only I weren't so inaccurate at 3BLD!