Chess960: Puzzle no.13 from the Sinquefield Cup 2014 - Game 4

Here is a beautiful Chess960 puzzle from the fourth game of the 2014 Sinquefield Cup between Chess960 world champions Hikaru Nakamura and Levon Aronian. Levon was faced with an interesting puzzle as early as move 4:

SP896 black to play (O-O-O possible) move 4:
Can Levon (black) take Hikaru's h2 pawn
without loosing material?

The answer is very funny, so enjoy it!

(solution: bottom left corner)

Answer, yes!:
Aronian decided against it, possibly because of the Rf2/g3 trap,
and so he played 4...Nh6 instead.
However:

4.     ... Nxh2!?

5. Rf2 ... b6!

6. g3  ... Ng4!! and the knight flees with attack!