As you stand by the booth looking at your pictures thinking that you will have to change back in a bit Tommy that big bully brushes past you into the booth.
You watch as he gets ready to take his own pictures and you say "hey kid there is a setting that is wrong on there here let me set it for you."
You reach in and press the weight to increase his weight by 500 pounds. Being almost 250 pounds of muscle and fat as it is this will really make him fat. You hit the start button before he can react and the pictures start to take and the changes start to happen.
You watch as the blubber starts to flow out the door side and Tommy gets fatter and fatter.
As the camera finishes it's changes the booth collapses around him having caused so much pressure on the sides.
There is Tommy a blob of a man at 18 and with the camera broken, neither of them would be able to go back to the way they were.