In a typical game scenario, a player might have a low pair and needs two additional cards of the same suit to complete a flush. If the first card on the turn matches the suit and the second card on the river also matches the suit, the player has achieved a Runner-Runner flush. This is considered an unlikely and often surprising turn of events, as it requires a very specific sequence of draws.
Runner-Runner Example
For example, imagine a player holds 8♠ and 3♠, while the flop reveals 10♣, Q♠, and 5♦. After the turn, a 4♠ appears, giving the player a flush draw. If the river card is a 7♠, the player then completes their flush using both the turn and river cards, illustrating the concept of Runner-Runner.