We don't suggest you do this at home without a tarp. In this episode of "What Were They Thinking?" Melissa shares a TV spot in which drones assemble a cake in honor of mobile operator Telia's 4G coverage success across Norway (and she wonders why her own mobile carrier hasn't gotten in on the drone game). Better yet, check out the behind-the-scenes video that Telia, BBD Oslo and Tilt put together to show the process behind the commercial.

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