The king explaining that when a man is accused of a crime he gets thrown into the arena with lost of people watching and the are two doors. Whichever door the man chooses decides whether he is guilty or not. Behind one door is a vicious tiger waiting to pounce and eat the man. The other door has a women waiting to marry the man if he opens that door
The king finds out about the affair between the princess and her boyfriend and instantly makes a court date for the man.
The man is in the arena and looks up at the princess to see which door to go to because the princess knows which ones the tiger and which ones the lady.
Without hesitation while looking at her boyfriend she quickly moved her had to the right and made sure the man saw.
The man having trust in the princess walks toward the door on the right and opens the door.