What did Dan Harrington have here?

[Saddlepoint]

From a CardPlayer update:

[ QUOTE ]
Minh Ly has the button, he limps for $200,000, and Harrington checks his option. The flop comes Ah-6h-4h, Harrington checks, Ly bets $260,000, Harrington raises to $550,000, and Ly thinks for about two minutes before calling. The turn card is the Jh, putting four hearts on the board. Who has the king? Harrington bets $500,000, representing a high heart. Ly thinks for a minute or two and then calls. The river card is the 2d, Harrington checks, and Ly thinks for a minute and then bets $1,300,000. Now Harrington goes into the tank to think things over. At one point, their eyes meet and they both break into smiles, and the crowd laughs. After another two minutes, Harrington folds, and Ly takes a very large pot.

[/ QUOTE ]

Anybody have any guesses what Harrington might have had, that he'd play this way?

Edit: Minh just won. For some reason, that makes me even more curious.

[Shandrax]

8-3o

[siccjay]

Any piece of the board? No heart.