Rumor that I heard awhile back...Is it true?

Awhile back I heard a rumor (cant remember where) that some wall can only be broken down with a certain fully upgraded weapon. I'm leaning towards this being false since I haven't heard anything on the subject since but, man wouldn't that be cool
Anyone hear anything similar to this?

Nope, false.

some people thought you might be able to smash centipede demon's giant door but no avail.

Thats what I thought...it was just wishful thinking

heh, you should have been around for the wishful thinking thread on old forums, 1700 replies with nothing discovered. was a bit depressing by the end of it.