Your finger hovers over the number pad on the console. You have discovered a magic photo booth in the a hole-in-the-wall magic shop downtown. Fine, you could go along with that. You got in and accidentally made yourself 45, looking like an older, fatter, and slightly more bald version of your father. And now you were planning on making yourself older? Heck, yes!
It would only be temporary, as you could just change yourself back to normal using the photo booth again. Besides, knowing what the future had in store for you would give you a chance to do something about it. You already knew you would get fat starting around your late 30's, now you could work on preventing that. Now, by making yourself even older, you could be on the lookout for other surprises, whatever they could be. Flawless logic! Let's do this thing.
You decide to take the scientific approach and enter the same number as previously: 30. That would make you 75. Fairly old, but you brought plenty of coins, so it wasn't a problem. You're about to press ENTER when a thought occurs to you. Perhaps you shouldn't be alone while doing this. Not only would another person be good for backup in case anything should go wrong, but they had to see how awesome this was!
You step out of the booth and pull out your cell phone, glad your clothes changed with you, and that your phone seemed to be in working order. You try texting one of your friends, but your thick fingers have trouble with the tiny letters on the small touch screen. So you call instead.
"Hey! It's me!" you say to your friend on the other end. "Listen, you have to come on down to that magic shop downtown! I've got to show you something. My voice? Oh, don't worry about it. Listen... No, Listen! It's really cool, you've got to see it. No, I can't tell you, you've got to see it for yourself. Because you wouldn't believe me!"
As you attempt to convince your friend to come over, you fail to notice a small ten year old boy climb into the photo booth while your back is turned. He saw you go in the first time, and noticed a completely different man come out. Then he saw you go back in and come back out but still be the same. Curious, he wants to see just what goes on in the strange booth. Inside, he sees the screens and buttons and recognizes it as a photo booth. He sees the screen showing a live video of his own face, and anther screen displaying the number "30" in bright, white letters. Curious, he taps the ENTER button below it, to see just what would happen.
At first, nothing seems to happen, and he's about to climb back out when he notices his face in the video screen looks different. It looks older, more mature, like a child of 13 or so.
"Cool," he mutters to himself, giving a gap-tooth grin. Well, formerly gap-tooth. He watches as his baby teeth vanish, one-by-one, only to be replaced with adult-sized teeth. The teen on the screen matured and his face became very square in shape, with a thick jaw and brick-like chin, which became handsomely pronounced as he entered his late teens. His body became decently muscled, with his pecs pushing at the fabric of his t-shirt, and his biceps straining at the sleeves. He could see hairs poking out from the collar of his shirt and a shadow of stubble coat his jaw. As he passed through his twenties, he noticed his muscle mas increase, going from merely decent, to outstandingly muscled. As he entered his thirties, his hairline began to retract, leaving an island of hair above his forehead as his hairline retreated halfway across his scalp. HIs cheekbones became more pronounced and his lower jaw seemed to jut a little bit, giving him a tough street demeanor. A small gut appeared at his stomach, which somehow accentuated his pectorals. His head hair retracted to a short buzz, and a thick shadow covered his jaw. He looked to be some sort of construction worker, off his shift. As he reached 40 and the booth chimed, faint rings appeared beneath his eyes, making him look constantly tired, though the once-child was elated and amused by the screen.
"Retrieve Your Photos Outside," the screen reads.
Outside, you finally finish your phone conversation with your friend. You think you finally convinced them to come over. While you wait, though, you could manage a couple more experiments. Heck, you have one waiting for you right now. As you turn to enter the booth, you hear a ticking sound and see a string of photos come out of the slot near the door. Curiously, you grab them to see a frame-by-frame transformation of a young child changing into a extremely thick, extremely strong looking man of about 40. Hearing a thunk noise, you see that same man leaving the booth, rubbing his forehead where he'd bumped it against the lip of the booth's exit. He must have felt his hiked-up hairlines, because he then runs a hand over his scalp, then down his face, feeling his large, stubbly jaw. He then looks down at his arms, which have a decent coating of hair, then puts his hands on his gut, as if feeling the heft of it.
"Whoa..." he mutters. Then he notices you. He grins sheepily. "Uh," he says. "Nice booth."
You stare at him back, your eyes wide. "What. The hell. Did you do?!"