Suddenly, Mike staggered and grabbed hold of Sei to keep from falling. He said, "Oh, I feel weird."
Sei grabbed hold of Mike. His legs felt like rubber. Sei said, "I feel funny too."
Sei and Mike sagged against each other for support. Sei was breathing hard, and said, "Mike, the cos-tumes, look!"
Mike opened his eyes, and stared at what Sei was staring at: the two costumes that looked like them weren't flat any longer. They were inflating, and moving.
The towel slipped from Sei's waist. Mike's towel hung limply around his waist, as his body and Sei's deflated. Mike weakly moved his arm up Sei's back, and gasped, "Sei, you've got a zipper on your back!"
"Huh?" Sei turned his face had sunken in like an empty rubber mask. He looked over Mike's shoulder, "No, you've got one too!"
They realized too late that they were becoming costumes, and the costumes were becoming...