Something took place on the deck last night. I didn’t see it so can only speculate on what caused the sisal carpet to fold up on itself and form a tunnel. I looked closely to see if perhaps something was in the fold, but no, the participants had absented. Possibly a cat in sudden flight from sound or another cat, the hind and fore legs unorchestrated so that the carpet gave way under the awkward onslaught. It must have been dramatic. That is quite a tunnel!