A Serious Case of the Sillies

"A Case of the Sillies" is the first segment of the twenty-second episode of Season One of JoJo's Circus. It first aired on March 24, 2004.

Overview
While at the big top, JoJo notices rather odd behavior among the circus performers. Everyone seems to be giggling and acting goofy, rather than working on their acts. When JoJo begins laughing like crazy too, it's a good thing that she's just caught up with Dr. Seltzer.