In which Penelope is… nice. No – really!

↓ Transcript
Panel 1:
(Penny reels from the explosion as Johnny and Bob rush to her aid. Pieces of the burst gas canister lie everywhere.)
Bob: Penny! Are you ok? I heard an explosion!
Penny: Why, I’m fine, Bob! It’s so sweet of you to ask!

Panel 2:
Penny: Well, best be back to work! I’d like to fix your computer now, if it’s no inconvenience?
Johnny: !!!

Panel 3:
(Penny staggers off, following Bob. A mysterious figure can be seen in the background.)
Johnny (to himself): Industrious & helpful? That’s not like Penny! But the gas is gone! That means…

Panel 4:
(The figure comes to the foreground and addresses Johnny.)
Bad Penny: Bow before me! For I am… Bad Penny!
Johnny: You know, I had a feeling you’d turn up.