I want to find little nightmare thread

It's gone, every post on the board knocks each thread down one place on the stack. If a thread passes the last position of the stack it gets deleted, each new post on a thread puts it back at the top of the stack. Ergo inactive threads that don't recieve any new posts invetiably get deleted whilst active threads persist.

The thread you're looking for barely had any activity so it got wiped and no, it's probably not archived anywhere so don't bother asking. You can start a new thread on the same subject if you really care that much, but considering that the original wasn't even sustainable...it's probably best if you just don't so that the board isn't plagued with another wasted thread slot :)