Sick hand: Quads - Suck -> re-suck

This is one sick f*ing hand! Look at this sucker!!!

Full Tilt Poker $0.25/$0.50 No Limit Hold'em - 9 players
The Official DeucesCracked.com Hand History Converter

CO: $53.05
BTN: $81.40
SB: $54.30
BB: $50.00
UTG: $16.65
UTG+1: $47.10
UTG+2: $51.65
MP1: $48.85
Hero (MP2): $80.95

Pre Flop: ($0.75) Hero is MP2 with 6s 6d
UTG calls $0.50, UTG+1 raises to $2.25, 2 folds, Hero raises to $8, CO requests TIME, CO calls $8, 4 folds, UTG+1 calls $5.75
I don't remember why I 3-bet, but I had a good reason.  I'm pretty certain that stats-wise, UTG+1 was raising wide (as evidenced on the flop with his check / fold)...

Flop: ($25.25) 6c 3d 3s (3 players)
UTG+1 checks, Hero checks, CO bets $12, UTG+1 folds, Hero calls $12
I was not happy about CO, if I recall.  I think CO was like a 5/0 or something...  I knew I had to hit this flop squarely in order to get paid.  Could it be any better of a flop?  I fully expect him to think his trappy PF flat of QQ+ is still good.  I'm going to let him keep value betting his chips.

Turn: ($49.25) Kc (2 players)
Hero checks, CO bets $11, Hero calls $11
I don't know why, but I had the distinct feeling that the King smacked CO in the face.  I had planned on check / raising a non- King non- Ace turn card, given his 5/0 stats (what else is a 5% VPIP player overlimping a 3bet with?)  I flat him for the second time, *HOPING* that he has AK, not a turned set of Kings.  I have also underrepped the strength of my hand at this point, so I don't think we're going to be playing for stacks on the river, but with most of the money in the middle, it's possible.  I think I'm folding a shove here - yeah, I'm 85% sure that he turned an over boat.

River: ($71.25) 6h (2 players)
Hero bets $22.05, CO calls $22.05 all in
WOW!  I 1-outted him!  How often When am I *EVER* on the good side of this situation?  I went from being happy that I only had 100BBs to wishing I had 500BBs.  Sick hand!  I don't think he really cares what I have at this point; I've repped 6's or 3's full, or AA (PF 3bet), but he knows he's got the non-quad nuts.

Final Pot: $115.35
CO mucks Kh Kd
Hero shows 6s 6d (four of a kind, Sixes)
Hero wins $112.35
(Rake: $3.00)