It sounds more like something or someone at school was upsetting him. I believe people can have premonitions/be psychic, but this just sounds like he was miserable at school. There may have been a very good reason for that, too.

Btw, WTF with this mom? She hears there's something bad going on at the school so she takes her son to the school he's not even attending?! Why in the world would she do such a thing? Who would deliberately take a five year old someplace that might be dangerous? That is insane.