“There’s no such thing as a free lunch,” as the saying goes. But when McDonald’s told Vietnamese consumers that there really is such a thing, thousands did not bother queuing for hours to get the freebie.

A free McDonald’s meal was available for anyone who went through the drive-thru section of the outlet of the world's largest hamburger fast food chain in District 1, Ho Chi Minh City and said the correct keyword.

The campaign ran for 24 hours from 8:00 pm Monday, and customers were required to say “I'm Lovin' It” to receive a free hamburger, French fries and a glass of Coke.

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