Tough spot with overpair...

Villain is solid: 22/17 and donk bets 16% which is fine. Got 11k hands on him and he's a small winner. He only c/r flop 3% of the time which is way below the normal 10% so this may be significant factor....

***** Hand History for Game 655115173 ***** (Betfair)
$50.00 USD NL Texas Hold'em - Saturday, February 20, 03:54:55 ET 2010
Table Neon 188 (Real Money)
Seat 1 is the button
Seat 1: rithm ( $28.90 USD )
Seat 2: zafaras ( $25.00 USD )
Seat 3: Tirlimbom ( $73.75 USD )
Seat 4: Peshka ( $26.60 USD )
Seat 5: BrasilNut ( $52.25 USD )
Seat 6: Buggaluggs ( $81.75 USD )
zafaras posts small blind [$0.25 USD].
Tirlimbom posts big blind [$0.50 USD].
** Dealing down cards **
Dealt to BrasilNut [ Tc Th ]
Peshka raises [$1.60 USD]
BrasilNut calls [$1.60 USD]
Buggaluggs folds
rithm folds
zafaras calls [$1.35 USD]
Tirlimbom calls [$1.10 USD]
** Dealing Flop ** [ 7s, 8s, 4s ]
zafaras checks
Tirlimbom checks
Peshka checks
BrasilNut bets [$4.20 USD]
zafaras folds
Tirlimbom raises [$8.40 USD]
Peshka folds
BrasilNut..............................................