Carrie hugged John tightly, feeling him deform easily around her. "Oh you look positively CUTE and BOUNCY!" She said happily. "I wonder..." She placed John between her legs and locked her feet. John's bottom and tail ballooned out underneath, providing something to sit on.
Carrie gave John a couple of test bounces, satisfied, she started using John as a bouncy toy. She giggled playfully and bounced high and far. Carrie wasn't paying attention to where they were going, she only cared about bouncing along. She felt John's balloon body deform with each bounce, pressing against her. It was such a wonderful feeling.