Snehk's Dreamlands

I was in my house. I entered parent's bedroom for some reason and saw my father in chains as if he was locked in a dungeon. The chains had control over him, making him aggressive. I immediately rushed to free him, breaking the chains. There were three chains and with breaking each one of them, a fingernail from my father's finger was torn. I finally managed to free him. Then I found myself in school, just before an exam starts. Curiously my father was taking an exam too, though it was different. I can't recall much from my exam sheets, but I remember father asking me about some other countries and details about them, even stuff like coal mines.