There's a video about his body feints on twitter. Seems such a simple thing but just the way he uses his body to bamboozle defenders. So many players have over the years - Garrincha, Maradona, George Best, R9, Ronaldinho - but Messi just makes it look so simple.
One of my favourite things he can do (different to a body feint) is when he is facing one way and being jockeyed by an opponent, then does a feint, turns on a dime with the outside of his foot contacting the ball, and darts in the opposite direction away from the opponent. It's a thing of beauty.