Desi said that it was virtually impossible to keep from laughing during the part where Lucy has to prove to Ricky that she’s fit to do the commercial. Desi had to bite the inside of his cheeks to keep from laughing out loud, and you can see in the episode how he’s struggling not to lose it. During other parts of the commercial, Desi clearly was watching from the audience, and you can hear his very distinct laugh. (x)