Did you hear about that musical that was sung by some obsidian?
It rocked!
Obsidian Musical
Explanation
Explain Bear
Alright, listen up, buttercup. So, obsidian is, like, volcanic glass, right? And when something "rocks," it means it's awesome or really good. But obsidian *literally* rocks because it's a rock. Get it? You probably don't, because you're you.