Starting at 3:32 a.m. on Dec. 16, hapless burglars descended on Frijoles & Frescas Grilled Tacos, a Las Vegas fast-casual restaurant, and attempted to rob the place after breaking in. Fortunately, Frijoles has a pretty good security-cam set-up, which captured the wannabe thieves in action. The next day, Frijoles posted a delightful video titled "Burglars Just Want Tacos | Restaurant Trolls Burglars," which cobbles together security-cam footage and riffs on the absurd premise, as the video's YouTube description puts it, that "These nice gentlemen came looking for tacos... we think."

According to YouTube, the video racked up about 30,000 views through Dec. 20, but it just blew up, having made Reddit's home page last night; as of this writing it's at nearly 500,000 views, and Frijoles has a bona fide viral video ad -- a sort of user-generated viral video ad, at that -- on its hands.

Simon Dumenco, aka Media Guy, is an Ad Age editor-at-large. You can follow him on Twitter @simondumenco.