I wouldn't be sure if this should be on a separate thread just because it has the same title.
Go back to the first post:
Thread to post cool or unusual Lemmings items.
I think by "Lemmings items" he means things like rare content, webpages, memorabilia or whatever. However, in combination with things posted in other threads, I think there are enough of these "quirks" in Lemmings levels for these to deserve a thread of their own - which I will go ahead and start now. (EDIT:
Link to new thread)