Jake decided on a kangaroo tail for Ryan. He set the length to be three feet, just as long as Jake's. Jake noticed a couple more boxes labeled 'user awarness' and 'subject awareness'. Jake figured he might get use out of that feature, but Ryan had to experience this for himself, so he unchecked both settings. Jake hit enter and watched Ryan.
Ryan was still scrolling through channels until he felt discomfort from his back. Ryan rubbed back there to try to get rid of it until he felt something funny. Ryan got off the couch and felt inside to feel something growing from his spine. Jake watched closely to see how Ryan was taking this.
"Uh Jake? Something doesn't feel right." Ryan said in a worried tone. "How so?" Jake asked. "Well... Woah!" All the sudden, Ryan's pants felt really tight. Something was pushing against the seat of his pants. "Oh God! I gotta take these-" Before he could finish his sentence, a loud ripping noise emitted around the room, leaving Ryan's pants ripped from behind revealing his growth.
Ryan's tail had already grown a foot long and was thickening at the base. "Hng... Is... Is that a-" Jake interrupted Ryan mid sentence. "Tail? Looks like it." Jake said smiling. Ryan felt his tail growing with every time he panted. "My God... This feel really good..." Ryan said holding himself up against the couch. Little hairs started at the base and were spreading all around his tail, which Ryan had the need to feel.
Ryan's tail was about two in a half feet by the time the fur reached the tip. "Jake? Did you d- Gah!" Ryan was interrupted with a surge of pressure causing his tail to quickly spring to its full length. After the spring of growth, Ryan feel on the couch stomach first. The rest of his tail was now covered in brown red fur, and his kangaroo tail was complete.
Jake approached Ryan lying on the couch panting hard. Jake put a hand on his tail and started petting it. "How you feeling bud?" Jake asked. "You did this. How did... Ohh yeah..." Jake continued to rub Ryan's long tail all the way from the base to the tip. "Your probably not going to believe this." Jake said as he started explaining the Chronivac.
"That is so cool. So you basically can change anything at your will?" Ryan asked finally calming down. "Correction, we. You and I are in control of this now." Jake said returning to his laptop enabling reality alteration. "Ready for more?" Jake asked.