Raising the river

[brettbrettr]

I've been thinking a lot about this play after reading about it in the archives. Hopefully, someone has a link b/c I can't seem to find it, but the gist of it is raising the river in the face of agression with a good, not great hand--the example in the archives used KK which was deemed to be too good a hand, something more like TPTK....Anyway, the theory, I think, is that opponents are less apt to reraise the river than other streets and you're essentially making a value raise. Here's a hand where I used this play, and another where I thought of it. Let me know what you think:

Foxwoods, 4/8 game. I open raise with AKo in MP. My image is lag and I see people whispering. Really I haven't done anything out of the ordinary to deserve it, I'm just betting/raising and missing. One of the whisperers (who seems tight passive) calls in the SB and its HU for 5 sbs.

Flop A44

SB bets, I raise, SB 3-bets, I call.

Turn (6 BB's): 9

SB bets, I call

River (8 bbs): 9

SB bets, I raise...

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Here's another hand where I thought about using the same play, villan is an unknown

Party Poker 5/10 Hold'em (10 handed) converter

Preflop: Hero is Button with T[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, UTG+2 calls, MP1 calls, <font color="#666666">2 folds</font>, CO calls, <font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, UTG+2 calls, MP1 calls, CO calls.

Flop: (9.40 SB) 8[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
UTG+2 checks, MP1 checks, CO checks, <font color="#CC3333">Hero bets</font>, UTG+2 calls, MP1 folds, CO calls.

Turn: (6.20 BB) 9[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">UTG+2 bets</font>, CO folds, Hero calls.

River: (8.20 BB) 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG+2 bets</font>, Hero ????

This seems like a good place for it, no? I mean, even 2 pair would have a hard time 3-betting me here even though the river changed just about nothing. His likely hands are draws or 2 pair--the draw won't call, the former probably will. I think the only hand he's 3 betting with here certainly has me beat.

Think I should raise this river?