You may have seen your Facebook wall full of giraffes and you might be wondering, "why?" There's a riddle called The Great Giraffe Challenge that's going viral where, if you get the answer right, you turn your profile picture into a giraffe.

Here's the question.

"3:00 am, the doorbell rings and you wake up. Unexpected visitors, it’s your parents and they are there for breakfast. All you have is strawberry jam, honey, wine, bread and cheese. What is the first thing you open?"

So! What's the answer? Any guesses? You already know it's a trick question.

** SPOILER ALERT **

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The answer? The Door, of course.

There are other answers is surely could be, but for the purposes of this challenge, the answer is the door.

I'm sure we'll see more challenges in the future.