Playing with new players is just strange. One hand I remember from my last poker night had a newbie (had played poker, but not Hold 'em) betting really strong on the turn with a 3 flush on the board. She was re-raised by another player who wasn't quite as new. They kept re-raising over and over. Naturally, I suspected one or both had a flush.

The river card came, the fourth flush card. It was checked to the newbie. She min-bets for T50 (after putting in probably over T400 on the turn.). Then she folds when re-raised. I asked what she had. "Nothing, I was bluffing." Thing is, no one else folded, despite the 4-flush. And no one had the flush.