The non-diegetic sound and ECU shots at the start clearly show an over exhadurated importance in the game as tension is seen to be built up as if it is like a Mexican stand off when it in reality is just a game of cards. This technique is effective because it also makes each of the characters intimidating to each other which makes the audience ask, who is going to win?
The way one of the shots is edited together to play in slow motion, again adds a dramatic sense of timing to the sequence. The change of non-diegetic sound at this moment forces the audience to go from a relaxed mood to a mood that implies great significance in the placement of the card.