Only 20% pf purchases at IKEA are planned ahead of time, the rest are impulse buys. The secret is the layout, which is a maze. You have to look at everything in the store to get to the meatballs. I've never been to IKEA, but can imagine that if you see something you like, you might consider putting off that purchase until later, but then you think about having to negotiate that maze again on another day, and so you go ahead and buy it now. My desire to shop at IKEA has dropped considerably after watching this video. Maybe I can sneak in the out door and get some meatballs someday. -via Tastefully Offensive
Also beware, most other stores including your supermarket also does this.