Staring at seven-stud hole cards is somewhat rare in public casinos, but it happens a lot in home games. The more important thing to focus on is that the player in the foreground is reaching for his chips. You should already understand that the gesture is purely an effort to prevent a bet. But wait! The video clip contains a terrific example of a Strong Means Weak tell that you might have missed. During play, the center player looks back at her cards, bets and then stares at the player in the foreground. By staring, she's hoping to appear threatening, so you know this means that she has a weak hand.
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If you're the bettor, continue with the wager. You might get called by the player in the foreground who missed the straight (he also has a pair of nines). Alternately, you might choose to check if you think that the chances of gaining a call are slim but that one of your opponents might try to bluff. You could then call and win an extra bet.