Sandy and SpongeBob were going to fly to the moon, but at night SpongeBob and Patrick got into the rocket and accidentally launched it. Fortunately, the rocket returned to Earth, but Bob and Patrick did not realize this and began to capture the innocent inhabitants of Bikini Bottom, thinking that they were aliens.
"Look what they're up to! They think, we think that we really think that we think that way, and we only think that we think that way, I think." (c) quote from great people.
P.S. Wow, Sandy is huge...