When you are on page 1 of the thread, pages 1,2,and 3 are shown as options. However, when you go to page 2, (this is where you locked the thread) the option to go to pg. 3 dissappears. If you go back to page 1, the option to go to page 3 comes up again. On page 3 is my comment that was posted after you locked the thread. Weird, huh?
You are able to post right before a mod locks the thread. I even tested it by replying to a thread 30 minutes after a mod locked it, by still being in the reply page, while the post is still trying to be submitted. So, if there is a spammy thread, and a mod replies to it, then afterwards locking it, you got about 8 seconds to get cracking on your last reply =P
Shin, you're way off. You didn't even mention anything about the mod's magic locking powers. >_> You do know that this is all handled with magic, right? And that the source of their magic is in Irvine?
I've explained this to thingthingfreak, so I'll copypaste that for everybody:
What you just managed to do is what has become known as "lasting", which is a form of performing a forum 'ninja'. Due to the way the server refreshes, it can take a few seconds for a lock to take effect, during which other users can still post if they were in the thread at the time. We don't really have to worry about that.
Also, if a page of replies is full (10 posts), then when the next page is started, the previous page tends to disappear, due to what I assume is a glitch in the coding of page sorting. A little annoying but again regular and harmless.
Note: We don't really mind "lasting" but if people start posting "last" whenever a mod locks a thread, that could get a bit annoying. Besides you'd only be a pale hack of lastmaster Lige, not least because he reached the Holy Grail of 1337ness postage and is no longer active on the forums.
Yeah, I've done this a lot. It is just like Fst6 said... If you have the thread open when it isn't locked, and after a minute or so it gets locked and then you post your reply.