This is new:

I know I get rate limited if I make more than one request per second for a while (and short bursts are allowed), but I didn't even get close to that. I was just browsing a few pages, looking for a pizza post made by someone. None of this was automated, and yet, Cloudflare kicked my butt!
Normally, when I get rate limited, it passes after a few seconds. I'm still blocked after 10 minutes now, no idea how long this is going to take.
Cloudflare's Error link:
https://developers.cloudflare.com/support/troubleshooting/http-status-codes/cloudflare-1xxx-errors/error-1015/Looking at my open tabs, this may have triggered it: I had one tab open showing "Verify you are human by completing the action below." and waiting to click the captcha. Meanwhile, I continued clicking through a few pages of a thread (to do a quick CTRL-F on each page) in another tab.