The Queen of Spades (opera)
Hermann can only think of one thing:  he wants to find out the secret of the three cards so that he can gamble and win lots of money.  Then he will be able to marry Lisa.  He hides himself in the grandmother’s bedroom.  When the grandmother goes to bed, he jumps out in front of her and tells her he wants to know the three cards.  She is so scared that she dies before she can speak.