Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title

In the first episode of "The Good Place", Janet plays a brief audio clip of what's happening in the Bad Place.  However, we later learn that Eleanor is already in the Bad Place, and that Janet is NOT part of Michael's deception crew and is further one of the good Janets that Michael stole. I realize that Janet may be playing an audio clip of what's going on elsewhere in the Bad Place, but isn't this extremely deceptive for a good Janet?
Audio clip of the Bad Place in The Good Place

In Prometheus, for what reason did Weyland hide on the ship? When he finally revealed that he was in the ship, it turns out nothing happens, there are no particular consequences and the reason for the secrecy is unclear. Why didn't Weyland just inform the crew that he's also aboard in the ship?  Can someone explain to me, what are the reason for this?
Why does Weyland have to hide that he was on the ship?

There is a strange scene in Billy Madison where Billy is cleaning erasers for one of his teachers -- Miss Lippy, a hippy-like lady who teaches an elementary class -- and Miss Lippy puts a big dab of paste right on her face. The scene ends right after she does this.  Why does Miss Lippy put paste on her face?

Why does the teacher put paste on her face?

