The day we had my office nap condo converted into the winter sun deck, Spidercat used the deck to get on the file cabinet. Sitting on the file cabinet are my CD player and stereo receiver, which are collectively high enough for him to launch himself up to my seven foot bookshelf.
Unlike the great kitchen cabinet adventure, Spidercat is allowed up there if he can get up there back down safely. We just prefer he didn't strangle himself in stereo cords or act like he wants to jump to the top of the open door -- he's not that good to balance on a two inch wide piece of swinging wood.
Also unlike the kitchen adventure, we're happy to report he safely came down the way he went up.