When a worse hand will call.

$1/$2 No Limit Holdem
PokerStars
6 players
Converted at weaktight.com

Stacks:
UTG ($323.80)
UTG+1 ($232.00)
CO ($385.35)
BTN ($326.00)
SB ($113.80)
Hero ($140.00)

Pre-flop: ($3, 6 players) Hero is BB
4 folds, SB calls $1, Hero checks

Flop: ($4, 2 players)
SB bets $4, Hero calls $4

Turn: ($12, 2 players)
SB bets $4, Hero raises to $18, SB calls $14

River: ($48, 2 players)
SB checks, Hero bets $22, SB calls $22

Final Pot: $92
SB shows:
Hero shows:

Hero wins $89 ( won +$43 )
SB lost -$46.00