The game is $1/$2 no-limit hold'em. A player raises to $8 from early position and it folds around to you in the cutoff where you've been dealt . You decide to call and everyone else folds.
The flop comes , your opponent bets $12 and you call. You both then check the turn. The river is the and your opponent fires another $20 into the middle — that is, a little less than half the pot.
You think your sevens might be good, but ultimately decide to fold your hand. The dealer pushes the pot to your opponent, collects the cards, and as another hand is dealt you sit and wonder what your opponent might have had.