Blossom: Don't worry everyone. Zynothium might be dangerous and unstable, but only when it's solid. It's actually a clean (and reliable) power supply when converted to a liquid or a gas.
Context: Buttercup flips her lid after Sci gives Blossom a robot arm (again, I'll explain later); Buttercup: Wait, the arm's powered by WHAT. Sci: *Told Buttercup what the robo arm was powered by*; Buttercup: ..You can't be serious. Sci: I am. Buttercup: Zynothium?!? You powered that arm with ZYNOTHIUM?!? Are you crazy!? That stuff is dangerous! And unstable! Tell me you were not stupid enough to go messing with it!