"Hmm... let me think." says Tails.

As soon as Tails started thinking about how to turn on the tank, it started to hiss.

"What the..." Tails said, growing by 10 cubic feet. "...Hmm..."

Tails thought about deflating, and 5 of the cubic feet left him into the tank.

"That's it! They're thought controlled!" Tails said. "All you have to do is think about inflating or deflating, and the tank will do the work. Try it!" he said, gasping for breath.

"Uh... sure!" Amy said.

So Amy thought. And she swelled up about 15 cubic feet.

"Wow, you're right!" Amy said. "This does work! But... what are we going to do with it?"