In which Penelope displays a certain… sixth sense shared by all intelligent life.

↓ Transcript
Panel 1:
(Penny and Johnny are in the server room. Penny looks agitated.)
Penny: Do you hear that?
Johnny: Hear what?

Panel 2:
(Penny rises from her chair.)
Penny: That! It sounds like some kind of off-coloured smell.
Johnny: You mean it’s a weird feeling you can’t identify.

Panel 3:
(Bob can be seen approaching, outside the office window.)
Penny: That’s just what I said! It’s like that feeling right before an earthquake, where all the animals run off in terror, or like when…

Panel 4:
(Bob enters.)
Bob: Penny! I just had an idea!
Penny: …that happens.