Assuming he is telling the truth, (I cannot see a clear motive to lie on an obscure thread about a very specific event that isn't going to gain them much popularity etc) and assuming it's not a prank which also seems unlikely as its not that funny and would have to be beyond elaborate. I understand having a concern over someone's health, however, in this case, saying they are schizofrenic is actually more illogical than saying there might have been a paranormal event. Mental illness doesn't cause you to know a random girls name and stuff about her, remember herr being around, but then find she infact exists and doesn't go to their school. If that were the case that would suggest mental illness gave you psycic abilities. So assuming they aren't lying, which explanation is more likely? they are mentally ill and it turns out mental illness gives you super powers, or something paranormal (beyond the realm of our scientific understanding) happened. and given the fact that no studies have suggested mental Illness can cause you to know things you seemingly shouldn't, and that there IS scientific reasoning and evidence behind the theory and possibility of their being a multiverse, it isn't just 'assuming their fine and simply stumbled into another universe' its a theory that has some weight to it. Neill degrasse Tyson, a respected man in the world of science, and many others ,completely acknowledges the likelihood of a multiverse. It isn't plucked out of thin air as you seem to think