Seat 2 is the button
Seat 1: Hero ( $412.30 USD ) - VPIP: 30, PFR: 21, 3B: 8, AF: 2,0, Hands: 2580
Seat 2: Player2 ( $366.65 USD ) - VPIP: 30, PFR: 19, 3B: 0, AF: 1,7, Hands: 208
Seat 4: Player4 ( $680.20 USD ) - VPIP: 26, PFR: 17, 3B: 2, AF: 1,5, Hands: 438
Seat 6: Player6 ( $457.65 USD ) - VPIP: 34, PFR: 18, 3B: 9, AF: 2,3, Hands: 113
Seat 7: Player7 ( $1078.50 USD ) - VPIP: 26, PFR: 22, 3B: 12, AF: 1,7, Hands: 309
Seat 9: Player9 ( $421.90 USD ) - VPIP: 16, PFR: 13, 3B: 12, AF: 0,0, Hands: 68
Player4 posts small blind [$2.00 USD].
Player6 posts big blind [$4.00 USD].
* Dealing down cards *
Dealt to Hero [ 7c 7d ]
Player7 folds
Player9 folds
Hero raises [$10.50 USD]
Player2 folds
Player4 folds
Player6 calls [$6.50 USD]
* Dealing Flop * [ 8h, 4d, 4s ]
Player6 checks
Hero bets [$10.50 USD]
Player6 calls [$10.50 USD]
* Dealing Turn * [ 7h ]
Player6 bets [$33.00 USD]
Hero calls [$33.00 USD]
* Dealing River * [ 8s ]
Player6 checks
Hero bets [$82.50 USD]
Player6 raises [$403.65 USD]

I had no reads about this guy except he seemed to be a new somewhat solid reg who hadn't done anything crazy in this session. What would be your thoughts on his line? I thought it was a bit strange since he shouldn't expect me to valuebet too thinly on this river so he "shouldn't" be checkraising good hands on the river.