Bernadette: Can we really help?
Howard: While we finish soldering these boards, it'd be great if you guys could wrap these pipe fittings with Teflon tape.
Leonard: I'll show you how to do one.
Penny: Hey, wouldn't it be funny if after all your years of hard work, I'm the one who makes a scientific breakthrough? (To Bernadette) He doesn't think that's funny.