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Because he isn't tall enough, Ben doesn't get to go to a ride at a water park. He tries to change into an alien, but instead, he ends up as Greymatter. Now, a geek who likes sci-fi captures him and gives him to an organization.
The episode starts at a water park, where Ben and Gwen recite an advertisement for a rather large water slide attraction, clearly excited about it. They head for the entrance, though Gwen was the only one able to get in line, because Ben is stopped by the attendant due to height regulations. Gwen then makes fun of him for being short and heads for the ride. Upset, Ben decides to transform into Ripjaws, to show the attendant just how big he can be. He hides behind a nearby pillar, and activates the Omnitrix. The face of it pops up, but he was not able to push it back down, despite after several forceful pushes by Ben. He eventually got it activated when he smashed the face against the pillar. The impact however caused a malfunction, and turns into Grey Matter instead. Instead of being noticed by others, it becomes a problem when a large crowd of kids comes running towards the attraction. Fortunately, Ben was able to dodge the stampede...Read the full recap
This episode aired at Cartoon Network's website for promotional purposes.
This is the first time we have seen only one transformation in one episode.
As of yet we have still not seen Grey Matter's transformation sequence.