My first chance to do some work for a feature film, back in 2010. I worked mainly on this one shot - rotoscoping, some selective cut-and-paste of the people, compositing.
There were several plates to choose from. I did some roto, moved some people around and composited it all together.
From the breakdown in the video.
VFX reel by Mint Visual Effects with the shot (check at 1:20).