Eric Lichtenfeld, author, Action Speaks Louder: Violence, Spectacle, and the American Action Movie (2007): The big fall from the building that Hans does after the thing with the watch? They had Rickman on the rig. I think it was called "The Decelerator." They were going to drop him, let's say, 35ft. So he started practicing. "3-2-1, go!" They practiced first from, like, 5ft and into the air bag, "3-2-1, go!" Then from, say, like 10ft. They worked their way up to a certain height. They said, "Now we're going to do it for real."
De Govia: Alan Rickman had to drop into a blue screen stretched over a bag. It might have been 30ft, which is plenty scary. You'd break your back, especially if you were untrained, but this is the thing about it: What you see on his face when he lets go is real fear. It's one of the greatest shots ever.