Interestibng Way to Play a Flopped Set

I was watching Poker Royale: Masters vs. Young Bloods the other day and I found a play made by Michael Gracz to be very interesting. Gracz had pocket 4's and called a raise by another player that was about 3 times the BB. Gracz found a 3rd 4 on the flop, but when it was checked to him he also checked, and again on the turn it went check-check. The turn also paired the board giving Gracz a boat. The opponent actually held A-J and when it was checked to Gracz again after a river 6, he went all in. I believe the board was something like 10-5-4-10-6 with no flush possibilities. The player with AJ thought it was so suspicious he actually called with ace high and doubled up Gracz. (critique that play however you wish). I was just wondering what everyone thought of that play. I no it can only be used under certain rare conditions, but I thought it was a unique way to mix up your play and was a way to try and get money out of your opponent when he won't put it in any other way other than an off the wall play like that. I know many of you ask why the opponent didnt make the standard continuation bet, but like I said this can only happen under rare circumstances.

[tripdad]

i didn't see this hand, and i can't say if i play it the same way, but obviously Gracz could not have played it any more perfectly than he did. the results speak for themselves.

tripdad

Is Gracz the type of player who would've called the initial raise with suited connectors?

If so, the 5-4 part of the flop makes the continuation bet a bit dicey, as Gracz could've been holding 7-6, and looking at an open-ended straight, which would've warranted a call or raise.

In Dan Harrington's book, he says the best type of flop for a C bet is something like a 9-5-2 rainbow.