The minutely-handsomer boy opened his mouth to continue their conversation but halted, as he spotted (in his near peripherals) a student (probably a damn teacher’s pet), assisting whom he guessed was the principal by pointing their direction.
Luckily, Scott’s back was towards them, and Marty slowly tilted his head down (as to have the brim of his hat obscure his features), and to stand the same direction of his doppelgänger.
“Don’t turn around, but I think your principal spotted me. Not sure about you, given the way you’re facing. May I suggest taking this conversation on the road?”
Ever so casually Marty began walking away - hopefully with Scott by his side - down the same sidewalks that led to where he parked the DeLorean not too far away.
Finally, but for the moment at a lower volume, he continued their conversation.
“My friend, yes. Doctor Emmett Brown. He’s a scientist, not a medical doctor, by the way. I promise you he’s not weird or crazy… Okay, maybe he is kinda weird and out there, but. . He has a heart of gold… And has been more of a father to me than my own dad has ever been. I kinda see him like my adoptive dad, and I presume he sees me like his son.”
He glanced over to Scott, giving a soft smile.
“That’s where you come in. In his quest of further scientific knowledge and observations of the universe and beyond, he was probably curious to see what our alternative versions were like. How similar, how different. He only spied and researched about you because you resemble his son; nothing more than that.“
“Any data or information he found was only to be for himself - but since I’m a very curious person, I found his papers laying in his lab, and had to see this “werewolf alt-Marty” for myself. And, so far, you don’t disappoint.”
Marty was glad to hear that the appearance of his hairier side didn’t necessarily spell trouble - he valued his skin too much to get clawed or scratched.
“… No, Doc’s not here; only me. And he doesn’t know I’m here. But, if you see a flying steam locomotive ever off in the distance, then know I - we’re - busted. He kinda has a number one rule of don’t interact with your alternative selves. Well the universe isn’t exploding right now, is it, Doc?”
Marty said the last sentence rhetorically.
“Wait, is that why–” Oh, that was why. He quickly followed his advice, taking his leave with his doppelganger and to avoid the principal. Knowing him, he’d really nip it in his ass for something he didn’t do. He wanted nothing to do with that, so he took the chance to quickly leave.
Scott intently listened to him describe his “friend”. So, he was a doctor? From what it sounded like, he wasn’t any “regular” doctor from a medical facility or anything like that. Little by little, he was trusting him as they walked, and a lot of what he mentioned made… some sense. Not entirely. Time travel was a weird concept, and he only thought it was in sci-fi shows and movies. He didn’t think it was actually possible. Some questions were brewing in his head, scratching the side of it with his hand as he walked with him.
“I mean, I… appreciate it?” He shrugged. “I’m just… I’m confused. So, am I like… related to you in some way? Like, yeah, we have the same looks, but… God, none of this makes sense to me.”
One hand was sitting in his jacket pocket, the other staying on his head as he tried to make sense of this whole thing. “Wait, interacting with… other alternatives of you can make… the universe explode? I– huh??”