When a popcorn thread first heats up, it should be placed under the "Fresh" heading. When it slows down but still sees action from time to time, it should be moved to "Still Popping." When it becomes an outright relic, it should be moved to "Classics." Obviously, if things get "lebedig" again, it can be upgraded again.
"Sizzling Popcorn" - these types of popcorn threads will probably be deleted with in minutes, so you better hurry and read them fast!