2nd disc: Go into Humans Only, and choose the Pixar door. Highlight the Monster's Inc logo by hitting down, and then hit left to circle the paper plane, or highlight the path of the plane. Hit enter, and you'll see footage from a paper plane show they had.
Monsters, Inc. (2001) - 4 easter eggs
starring Billy Crystal, Bob Peterson, Frank Oz, James Coburn, Jennifer Tilly, John Ratzenberger, Mary Gibbs, Steve Buscemi
Easter eggs are hidden bits on DVDs which aren't advertised on the cover, but if you know where to look can provide all sorts of fun extras.
2nd disc: Go into Humans Only, and choose the Pixar door. Highlight the Monster's Inc logo by hitting down, and then hit left to circle the paper plane, or highlight the path of the plane. Hit enter, and you'll see footage from a paper plane show they had. In the 2nd disc, choose the Monsters Only door. Hit right to highlight the eye on the logo on the place where Celia takes the calls. Hit enter and you'll find clips that the crew made, using scenes from the movie, but not actually following it. Inside the 2nd disc, go into Humans Only. Select the Production Tour, and watch the 6 clips, or you could hit >>| until the chapter reads 7. You should enter a menu with doors like the ones from the intro, only red and orange (something like that?). Check behind each of the front 7 doors. In the 2nd disc, go into the Humans Only door. When all the doors in the vault have stopped and have all been activated by Boo's laugh, hit left to highlight DVD Credits, and you'll view them when you hit enter.