Noh
My group was in a dungeon where, unbeknownst to them, they were being tested by the spiritual forces that resided within, in order to see if they were worthy of... bla bla bla, the same old shtick.
They find a secret door, and inside is a pedestal with a highly ornate and obviously magical rapier (which two of the characters used), resting upon a similarly ornate/magical chain shirt that the two other characters used.
Next to them, a young girl, with a blank expression, simply requests, "Please do not take these items." Of course, my players didn't want to pass up such great items, but they knew that something bad would happen if they just took them, they decided they needed more information before they could make a desiscion. Pretty standard method of action. And, the only way they could get more information was from the girl.
I didn't want to spoil everything, and more importantly I wanted this to just be a short test so we could go on to the next part. Also, since she was just the physical manifestation of a minor spiritual entity, she didn't need to do any more than fufill her task as a test giver. So, I decided she would be like a NPC from a videogame. She would only respond with "No" or, if a negative answer would confuse the players or the players decided to get crafty and ask something like "Can we NOT take these items?", she would simply reply "Please do not take these items."
The conversation was pretty much: P1: Can you tell us about these items? DM: No. P2: Can we ask your name?" DM: No. P1: What are you doing here? DM: No. P3: Are these items important to you? DM: Please do not take these items.
The players kept at it for a few minutes, until the bard decided to use a perform check to "Awaken her dormant soul etc." and rolled a 19. As such, I decided I might as well say that she shed a single tear.
At this point, my players could no longer stand it. And they ended up doing something I was completely unprepared for.
One of them scooped her up, put her on his shoulder, and decided they were going to take her. They quickly began to argue as to which one of them was going to carry her, completely ignoring the amazing magical items less than an arm's reach away, and talking about how she was the cutest thing in the entire world. I had added this whole test as a bit of a side thing, and didn't know what to do.