One of the things that has been so great about the Marvel Cinematic Universe is that it's obvious there are crazy amounts of VFX being used, but they never feel fake, particularly in the city scenes from The Avengers. The Iron Man franchise has been right on its heels, with Iron Man 3 being perhaps the most spectacular yet.
Special effects nerds will be blown away by these VFX reels that have been produced by Digital Domain. The two clips show how they got to melt and pull down a water tower bare-handed, put him into a virtual Iron Patriot suit, and how they created Air Force One from scratch for the mind-blowing human chain rescue sequence.
Epic. It's amazing what VFX can accomplish these days, no?