Howard: You okay?
Bernadette: Uh, I think that was a contraction.
Howard: Is it time? Do we need to go to the hospital?
Bernadette: No. We've been through this before. My water hasn't even broken yet.
Sheldon: Never mind your water. Has your mucus plug popped out?
Bernadette: Ew, no!
Sheldon: Oh, you're right. We probably would've heard that.
Penny: It's not a champagne cork. Although that would be festive.