I think my boss is crazy?

I've been working here for two years, right? Is my boss just...crazy? One day he's like, "You're doing great," and the next day he's like, "Why haven't you invented teleportation yet?" I mean, what the hell is going on? It's like he has two sides, but sorry, I can't defy the laws of physics. This sudden change is really nerve-wracking, you know? I love my job, but dealing with this emotional roller coaster is exhausting. It's starting to mess with my brain. Is this a sign of stress, or do I have reason to think it's time to calm down? Anyone else have a boss who acts like a squirrel on coffee, or is it just me? Help me, guys!#JobDilemma #BossBlues #WorkLifeBalancemaybe