"Since the isolation of myostatin and activin A" got my attention.

most of all these are fictional but on the second thought, gene coding reassembling can trigger a change in genetic makeup of our body leading to mutated genes...the myocytes of the muscle can undergo hypertrophy beyond its strength if appropriate nutrient is supplied. Bones can grow at any length...shortness can be a history.

But invisibility is far fetched in gene modification but I strongly know that a photo emitting device can alter or deflect images at the retina thus make making invisibility close to possibility.