As Skipper is untying the ropes from the Galloping Gazelle's body, the ropes change position, with the one by his neck appearing and disappearing between shots. See more
[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!
[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