- Skipper Mathews: Libby, you gotta be careful. The Mutant's in here! He could be anything. He could be the desk, or the floor, or the railing, or these pipes, or the ceiling!
- Libby: I know, I know, he's the Masked Mutant. He could be anything; he could even be me.
- Skipper Mathews: [in a wave of terror] Libby, that's not funny.
- Libby: There is no Libby - there never was.
- Skipper Mathews: Oh...
- Libby: [walks toward him, evilly] And now I must do something very bad to you, Skipper.
- [Libby laughs maniacally revealing herself to be the Masked Mutant]
- Skipper Mathews: No, please! I'll just leave and take a bus home, and I won't tell anybody, honest!
- The Masked Mutant: [turns to himself, chuckles evilly] I can't let you leave! You belong here now!
- Skipper Mathews: [as the Masked Mutant begins to transform into acid] Aha, there's one thing you've forgotten, Mutant! You can change into a solid and back, but once you change into a liquid, you're dead!
- The Masked Mutant: What? You tricked me! The great Masked Mutant, tricked by a boy!
- Skipper Mathews: [picking up the Mutant's mask with a rolled-up comic book] Yes, I've destroyed him! The most evil supervillain to walk the planet is dead!
- [laughs maniacally and triumphantly]