A video featuring McDonald's CEO, Chris Kempczinski, showing off the chain's new Big Arch sandwich has been viewed as a mystery. The sandwich, which features quarter-pound patties, crispy onions, white cheddar cheese, toasted sesame and poppy seed bun and its signature “Big Arch” sauce, was introduced in the video in February. However, some online users were left perplexed by the seemingly microscopic bite. The video has been shared by both McDonald's and rival Burger King.