Quote from Raj Koothrappali in the episode Spoiler: Gary Dies
Bert: We're not gonna throw rocks. We're gonna make bombs out of them. Stuart: What? Bert: Behold. Potassium. And some water. Everybody needs to step back a little, please. [Bert chuckles after he drops the piece of potassium into a bucket of water, causing an explosion and a fountain of water and gas to shoot out of the bucket] Bert: Cool, huh? Raj Koothrappali: Yeah, if the guards are taking a bath. Bert: No. We're gonna make grenades. Raj Koothrappali: How come I never thought of that? Bert: Don't be hard on yourself. Most people underestimate the mighty force that is geology.
