Pre Flop: (1.5 SB) Hero is BB with 4
J 
UTG raises, 3 folds, Hero calls
Flop: (4.5 SB) 7
7
J
(2 players)
Hero checks, UTG bets, Hero calls
Turn: (3.25 BB) 7
(2 players)
Hero bets, UTG calls
River: (5.25 BB) 8
(2 players)
Hero bets, UTG calls
Awesome analysis guys. Love it.
Firstly, I completely agree about preflop. As soon as I clicked "call" I didn't like it, but this guy was super straightforward, so the sooted Jack must have been too pretty to pass up. 
[Oh, and I don't believe in coincidence. The reason I played this hand is so I could post it here.
]
Here's the main reason I've been playing with the c/c, donk Turn line on certain boards: villain plays badly against it. Honestly, on paired boards, especially, is where I've been testing.
Here are my "arguments" for why I've been playing around with it. I have tried playing this straightforwardly, raising the Flop or waiting and raising the Turn. I find that, MOST OF THE TIME, almost all villains play extremely well against it on this board when I'm OOP. ie, they fold when they should fold or raise me with a better hand after I've bloated the pot and hate folding, especially since it IS a paired board that contains a LOT of draws.
Lots of Turn cards scare me into not-raising.
Raising anywhere, as opposed to just calling or donking, opens my throat to a 3-ball. Again, on this turn, for instance, I can never know what his hand is (tons of draws, again) so can really never fold. Is he going to reraise me with TT if I raise somewhere? What about QQ? What about 89/9T/T8, hearts, 2 overs, etc, etc, etc.
I have provoked a lot of BAAAD turn raises verse my donk. Once they raise the turn, either with AK, QQ, air (donk on this board??? I RAISE!!!), or a legitimate draw, they almost always fire the river bet regardless. I have found that my money is going in much better (verse calling down a turn 3-bet, for example).
Never allows a free card or free SD to A-high or worse hand, which is never, ever, chever folding after I donk and bet the river. K-high reeeally wants to call down. So does Q-high sometimes. Think about how often these hands are within his range here.
Hate donk/folding this river/board.
We are all awesome post flop players and DC members, and STILL you guys are having a really hard time figuring out what to do against my donk. 
I can very easily balance this play. I am only doing it on this type of board. It's a super cheap bluff/semi-bluff (think about if I have the 89/9T/8T, hearts, air). If villain is tight and straightforward, usually fearing me by this point, my Turn bluff is 3:1 and then river bluff 5:1. Think about how often this needs to work (when I'm balancing).
Session-meta. I loooooooove session-meta and believe this to be one of my strengths. This is one way I get people to SPEW on me. If I DO decide to bluff here, in this way, I get yelled at, called a horrendous donkey, nobody's ever folding there, blah blah blah. CHA-CHING!!! Time to get PAID! Begin spew-fest 2009 from the whole table against me.
I love LHE. 