Fun With Staircases! (Master source list)

This a master source list for a poll suggestion. It is to be cut down to 35 for an IMDb poll. New entries for that poll can include entries not on this list (but they too will be added onto this list too with accreditation to the one suggesting it). (Sorry for sounding like Dr. Sheldon Cooper, phd. of The Big Bang Theory but I couldn't resist the pun.) Wether dancing up, walking up or falling down, several movies and directors have featured scenes with or on staircases. Especially spiral staircases seem to be of particular interest to many filmmakers. Alfred Hitchcock had featured a staircase scene in so many of his films. Here are some of the most notable. Which is your favorite? Or do you have some to add?