Visible crew/equipment: After the fashion show when Zack says "Sorry Lisa, I don't know what to say" an entire boom microphone assembly is visible and snatched out of view at the top of the screen.
Visible crew/equipment: In the scene where Zack talks to Jessie about switching desks to be next to Kelly, you can see the top of the set for quite a few seconds including lighting, scaffolding and tops of the adjoining rooms. (00:06:15)
Visible crew/equipment: During the opening credits, as Zack Morris walks into the frame of the school store, you can see the boom microphone briefly lower into the shot up near the EXIT sign on the wall. (00:01:20)
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.