Matt sat down in front of the computers, "I do have some ideas for you and me". "Sure what are they?" "I'd rather not tell, but show you instead, if you don't mind", Matt replied. Jacob was curious and a bit scared, but he knew Jacob for quite some time so he trusted him. "Alright, let's do it", he said and Matt started setting many things, effectively entering a fairly complex transformation, he clearly had read the documentation before as he was able to work rather swiftly. Finally Matt finished and looked over to Jacob, "Ready?" Jacob stood up, walked to roughly the middle of a patch of empty space and said, "Alright, let's do this!".
Moments after Matt started the changes, Jacob's chest hair started to grow into a brownish fur coat. The same coat started to spread across his whole body covering everything from his face to his feet. He looked at his arms which shrunk down a bit before looking at his hands. gradually they were covered in a short pelt, except for black pads at the fingers and palm. His fingernails turned dark and became longer and sturdier, like claws. Then his thighs balooned in size as the rest of his legs became thinner. His feet grew to about twice their normal length with some of his toes merging together while his toenails also changed into claws. From the end of his spine a tail started to grow. At first it was quite thin, but then in grew in length and width, easily reaching the ground and strong enough to act as a third leg. Eventually he felt more comfortable standing on his toes, using his tail for additional stability. Eventually his ears grew in size becoming a bit floppy and more expressive and his face pushed forward into a muzzle.
Jacob looked at himself then Matt, "You wanted to change me into a kangaroo?" to which Matt replied, "That's just the first stage, there's more planned for you".
Then the second stage kicked in. On Jacob's back a lump started to appear pushing itself through his skin. It had roughly the same brownish colour as his fur, but was shiny, and as of yet, just a blob. Gradually that blob grew 2 tubes running down his sides, open at the top and somehow ending somewhere in the blob. The middle of it grew even higher where it split up, forming a fairly complex set of mechanics as well as a pair of blades going of in opposite directions. Jacob watched it as he grew hard forming seems between several cover plates. Puzzled by this he reached behind and could easily spin the blades around... like helicopter blades. Then a much smaller lump grew on his tail, forming a smaller rotor there on the side of it. Suddenly he could feel something inside of him changing before clustered holes appeared on the sides of his abdomen. Those holes changed into exhaust vents as a pair of turbine engines formed near his back. It seemed strange at first when stats about his engine and flight surfaces entered his mind, but gradually it made more and more sense to him. He was now a kangaroo that was part helicopter. He was confident that he could fly now, provided he had the space for it and this made him horny as was clearly shown by his glistering pink penis pushing through his sheath.
Matt watched the changes and momentarily the 3rd round began. At his chest something began to push through his fur, forming a leathery substance above it. This created a blue jacket with red sleeves. On its front there were 2 rows of golden buttons. Shoulderpads started to appear, lined with rows of strings like you would see on your stereotypical admiral or something. The leather jacket formed a set of pockets and where Jacob's vents were, they also had flaps. Around the lump on his back it smoothly fitted on the interface between fur and metal. Then something similar happened at his legs a leathery substance pushed itself in between the fur and created a layer on top of it. It formed smoothly around his tail, covering the first feet of it. As the details formed it became obvious that those pants were open with their zipper and a belt open.
Matt stood up and greeted his friends with the words "Aye Capt'n" and everything became clear to Jacob. He was the leader of a group he should form. He could change into a full helicopter at will, and nobody would be wise of his true nature. He could be good, or bad, saint or scrooge. It was up to him, but in any case he needed some help.