A Tale of Two 6s

$20 buy-in SNG. The blinds were 50/100, and I had 1900 in chips in middle position.
There were 6 of us left, and I was in 2nd chip position. The chip leader had about 2300.
I was dealt pocket tens, and the under-the-gun player went all-in for 1100.
Everyone folded to me (including the chip leader), and I felt that this decision would determine my tournament. If he had overcards, I was ahead, but barely; if he had a bigger pocket pair, I was in trouble; if he had a smaller pocket pair, I was way ahead.
My opponent had been very aggressive the entire game; I figured he had a pocket pair smaller than 10s or overcards, so I called. Then I kicked myself for calling! While the rest of the field folded, I convinced myself that my opponent had an overpair.
Everyone else folded, and the cards were turned up -- he showed 66!
He didn't improve and I knocked him out and became the overwhelming chip leader.
By the time I was the big blind, blinds had increased to 100/200.
A middle position player -- with 1100 in chips -- opened for 400, and everyone folded to me. I had 66!
I figured I had the best hand, but rather than re-raise pre-flop, wanted to see if I could get the rest of his chips (we were down to 5 players at this point). So, rather than re-raise, I just called.
The flop was an amazing 6, 2, 2! I flopped a big -- and deceptive -- full house.
I checked, he bet 200, I mulled it over and called.
Turn was a blank (but put 2 clubs on board), I checked, he went all in, I happily called. He didn't have anything, the river blanked off (though, no card could help him), and I raked in the pot.
I had more than 4,000 in chips at that point (everyone started with 1,000, so I had 40% of the chips), and I went on to win the $100 first place money.