500+ hands on villain. 21/17 with 5.5% 3bet, 3bets the SB vs a button open 17%. Generally seems a typical reg.

WTF can he possibly check the turn with, have me check behind, then check the river again (risking it just checking down) then jam for value?

Any thoughts?

Poker Stars, $0.05/$0.10 No Limit Hold'em Cash, 6 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

Hero (BTN): $11.68 (116.8 bb)
SB: $15.34 (153.4 bb)
BB: $21.09 (210.9 bb)
UTG: $19.12 (191.2 bb)
MP: $13.53 (135.3 bb)
CO: $6.92 (69.2 bb)

Preflop: Hero is BTN with A Q
3 folds, Hero raises to $0.20, SB raises to $0.70, BB folds, Hero calls $0.50

Flop: ($1.50) T Q 8 (2 players)
SB bets $0.85, Hero calls $0.85

Turn: ($3.20) 3 (2 players)
SB checks, Hero checks

River: ($3.20) A (2 players)
SB checks, Hero bets $2, SB raises to $13.79 and is all-in