[NL2 FR] Strange river bet after checking down flop and turn

[iLike]

$0.01/$0.02 No Limit Holdem
9 Players
Hand Conversion Powered by weaktight.com

Stacks:
UTG ($2.07)
UTG+1 ($2.12)
MP1 ($1.03)
Hero ($2.02)
MP3 ($5.04)
CO ($1)
BTN ($2.48)
SB ($1.87)
BB ($5.03)

Pre-Flop: ($0.03, 9 players) Hero is MP2 9 9
1 fold, UTG+1 raises to $0.10, 1 fold, Hero calls $0.10, 5 folds

Flop: 8 2 A ($0.23, 2 players)
UTG+1 checks, Hero checks

Turn: 6 ($0.23, 2 players)
UTG+1 checks, Hero checks

River: 4 ($0.23, 2 players)
UTG+1 bets $0.12, Hero ???

I guess he either was trying to slow play some big PP or he is bluffing with total air.
Villain was 38/5 over 40 hands.

[Donachello]

Looks like a big PP that is scared of the A.
I call as played but it's pretty meh-obvious what he has here. Make a note

[dahve3d]

I really want to bet this flop, especially where he's the PFR and doesn't follow through with a cbet on a very dry board like this, it looks exactly lot like a PP scared of the A... on the other hand because the board is so dry you're really only repping the A by betting the flop so he's gonna think you're FOS a lot of the time. If you have a read that he's aware enough to lay down hands as opposed to the typical fish thinking of "QQ is a good hand I call who cares if there's an A on the board" though I think a flop bet is good here, with the possibility of firing dry turns like this one if checked to since it probably takes 2 barrels to get villain off his hand here a fair amount of the time.