Curiously Jacob turned the "FORM" know to "HUM", wondering what would happen. On the outside Matt's "jet-pack" retreated into his body and his face returned to a fully human form. He looked fully human. Jacob however still was inside the cockpit inside of Matt, able to control him, though all the flight-related controls were gone. As Jacob was not controlling him, Matt rushed to the nearest mirrow inside the house looking at himself, "Ohh bummer, looks like my chance of flying is off for now".
Meanwhile Jacob was looking at the controls he had at hand. He found that on the computer screen he had an option to inhibit the changes for certain body parts. He inhibited it for everything except the penis and turned the "FORM" control to "JET".
Suddenly Matt's penis started to grow and become longer, Matt opened his pants as a metal canon like from a jet fighter pushed out against the fabric. "What the fuck are you doing?", Matt exclaimed as Jacob found out he could swivel it via the gun controls which were just appearing. Aiming it at a spot on the wall, Jacob activated the guidance control to keep the gun locked on target. This caused Matt to start to become aroused. Every one of his moves caused his member to move to aim at the target, ready to shoot at any command. Every second of suspense made him more aroused as finally Jacob pushed the button and a tiny projectile was shot out of Matt's gun-dick. For Matt this was sudden relieve as he was able to shoot his load out, shouting "Wow!".