Muscle ups, side lever (better known as Human flag) are just 2 out of many body weight feats, which is achievable, if one put his heart to it.
Strength and health should be the main objectives for you to train, and bodyweight training can help you achieve that, anywhere. No more excuses for lack of equipment or space. Ever wonder how a child with just one toy can entertain themselves for such a long time?
With the understanding of your body, and what you can do to it, you too can open up possibilities given the surroundings and circumstances. Nope, Jay will not simply tell you what to do. At the beginning maybe, so you start to have a list of basic exercises.
Then you will start learning how to modify your training according to your environment and maybe even discover something new yourself!