McDonald's CEO roasted after his tiny first bite of new Big Arch burger goes viral

The CEO of McDonald's posted his review of the chain's new Big Arch burger — but social media ended up taking a bite out of him instead.

The fast-food giant rolled out the Big Arch burger Tuesday, noting it's available for a limited time. The McDonald's website describes the burger as having two quarter-pound patties, three slices of cheddar cheese, lettuce and pickles — plus crispy and slivered onions.

What truly makes the burger stand out, McDonald's says, is its sauce — which is "tangy [and] creamy...