The Mamas and the Papas - S1-E12
Character mistake: Lisa is upset about being paired up with Screech. Mr. Belding explains to Lisa that the matches were paired up alphabetically. But this is proven incorrect - although Kapowsky (Kelly) and Morris (Zack) are very close, and Slater (AC) and Spano (Jessie) are even closer alphabetically, Powers (Screech) and Turtle (Lisa) should not have been paired. Assuming no other kids names' interfered with these six (in which case the groups would be different anyway). The correct pairs would be Kelly and Zack, Screech and Jessie, then AC and Lisa according to true alphabetical order last names.
Answer: Zack is always good for a sarcastic jibe. Lisa was written as the most fashion and make-up conscious of the Bayside High girls. She was also portrayed as serious and somewhat prissy. The "crack your makeup" comment was a throwaway line. Zack was suggesting Lisa doesn't often get overly excited for fear of having to reapply her face. The line is met by laughter and screeches from largely adolescent female audience that seem out of proportion to the humor. "Saved By the Bell" audiences were rather prone to such excessive ebullience for no apparent reason. The reaction didn't last long, and the scene moved on quickly.
Michael Albert
Yeah that doesn't make any sense.