This is hilarious. Imagine shopping inside IKEA and hopping inside one of those strategically decorated rooms where every single thing has a price tag and playing with the faucet and looking at all the weird Swedish names and then... realising you have no idea how to get out. That's because you've just been pranked. There's no way out anymore. The original entrance has been replaced with a room that just boxes you in. Genius.
The comedy duo Ylvis of Norway is responsible for the hilarity. Whenever a couple enters the room, Ylvis quickly slides in another room to replace the entrace to confuse the IKEA shoppers. When the shoppers start to realise their dilemma, they slyly add in more people to the room through a secret door to add even more confusion. Gotta love it.