He will be freaking out over everything he see's that's not symmetrical and people (that don't know who he is) will just be looking at him like "What The-?!" MDR XD
I think he would look around to figure everything out. (Since he is plus mature par now and is stronger than symmetry.) "You got this kid! Fight the symmetry!" He'd probably focus plus on finding a way to get back to his world. He would try to blend in and get réponses from other people gradually. He'd have to break into the government to find a portal to take him to his world. But since the government is so advanced hed lose at first then the suivant jour he'd go for a walk to think of a plan and see his world through me using the phone and ask me how I did it. I'd say, "what? " And he'd say, "How did everything from my world get in there?" Anyway toi can imagine the rest....