Ever the perfectionist with props, Lucille Ball practiced making pizzas by throwing dough in the air at a real pizza parlor (Micelli's Pizza Parlor) in Hollywood. She became so good at it by filming time, after the episode was done being made, she made pizzas for the cast and crew at Micelli's, where she learned how to throw the dough.
When Lucy put the pizza dough over her head to hide from Ricky, she said that she realizes quickly that she needed to suck a hole through the dough so she could breathe.
While trying to figure out who Mario is, Desi says, "he looks familiar." In fact, the actor Jay Novello had appeared on the show twice before as different characters.
The pizza maker who Lucy watches before she has to take Mario's shift was a real-life pizza maker at the local pizza parlor (Micelli's) where Lucy was taught.