If they reach the top and save the town, my whole hypnosis-in-the-escape pod scheme will be ruined! And I still don't have a plan to stop them! Well, Karen, my evil genius is exhausted.

My Avalanche Maker 3000! Oh, Karen. It's evil, it's diabolical…It's lemon-scented! Mwahahahaha!

What you said was true; it would take too long to hypnotize each of them into loving my chum burgers. But when fish are scared, they school together. If I get them all in one place, trapped where there's nowhere to run, I can hypnotize them in bulk. First, though, I need to shut down that squirrel.

[Sing the following from "When the Going Gets Tough"] ♪ This task force is for losers, I've got the perfect plan. Right now, the gettin's good, so let's get out while we can! Look, lava's pretty hot, let's give in to our fear, disaster's on its way -- that means we can't spend vaporized without a doubt; before that sucker blows, we've got to get the fish out! So let's go, and be gone! So let's go, and be gone! So let's go, and be gone! So let's go, and be gone! ‘Cause when the going gets tough ♪ 

Reference: https://www.youtube.com/watch?v=KL7oO48Ktzo