Cool Behind the Scenes look at Skyfall

For my scene insertion I am doing the final poker scene from Casino Royale. While I was on the internet looking for the clip I came across this clip of a behind the scenes look at some of the effects from Skyfall:

The video starts out by showing the scene where Daniel Craig and Javier Bardem are running through London underground, followed by the scene where the train comes crashing through the ceiling. While they did film the actual crash, quite a lot had to be removed in post to make it look realistic. They also added in a driver in post, along with signing on the front of the train. Pretty cool stuff.