The directors put in easily 45 minutes of explanatory dialogue outlining this "world is an illusion" stuff -- most notably that distended, bloated speech by Morpheus, which was delivered with less grace than a Powerpoint presentation. Yet in reality, the idea is so painfully simple that it could have been compressed easily into, say, two or three lines of dialogue:

Morpheus: Dig this -- the world is a massive illusion, created by machines to keep humans docile. You're actually a body floating in a jar.

Neo: That would explain a lot.

Morpheus: Cool. Now let's go kick some robot ass.

... and honestly, the movie would have been 44 minutes shorter, and a lot better.

source: www.collisiondetection.net