Chess: a T-Shirt with "Nh5 exclamation mark" refers to which of Fischer's games against Spassky?

11. . . . Nh5!? was Fischer's theoretical innovation in the Benoni in Game 3 of his 1972 match with Spassky, which led to Fischer's first win in the match (after he'd lost Game 1 and forfeited Game 2).

The World Chess Hall of Fame has a set-up of the position after Fischer's move on display, along with the chess set used for that game in the match, which was signed by both players:

http://www.worldchesshof.org/exhibitions/exhibit/us-and-world-chess-halls-of-fame-and-highlights-from-the-permanent-collection/

"Game 3 of the 1972 World Chess Championship has been considered to be the turning point of the match. After losing Game 1, Fischer did not show up for Game 2 and demanded that Game 3 be played in a small room, backstage away from cameras. At the last minute, Spassky agreed and was beaten by Fischer for the first time ever. Fischer played the ultra-sharp Benoni with the double-edged novelty 11...Nh5. The rest of the games were returned to the main stage but without cameras at the demand of Fischer. This set was used in Game 3."

It relates to the 1972 World Chess Championship against Boris Spassky. It is a bit too complex for me, but the unusual move occurred in Game 3.
https://en.wikipedia.org/wiki/World_Chess_Championship_1972

The notation 'Nh5!' means that he moved his knight (N) (Knight is not 'K' as that is the King's symbol), to square 'h5', the fifth square on the rightmost column. The '!' denotes a 'good move'.
http://www.chess.com/article/view/chess-notation

Game 3, 11th move, of the 1972 World Chess Championship. Initially weak-looking, but later known as Fischer's "Secret Move," among other things it set his (black) queen up to swing into action, which, further down the road, helped force Spassky to resign, his first loss to Fischer in tournament play. It couldn't have come at a more opportune time.

http://www.chess.com/blog/NimzoRoy/bobbys-first-win-vs-boris-fischer---spassky-wch-1972-game-3