"How I Met Your Mother" star Neil Patrick Harris was on David Letterman Wednesday night, and while showing off photos of his new adopted toddler twins, he had a story about his children's first trip to Las Vegas.
Harris played a clip of his daughter reaching for the slot machine, at which point a security guard came by and warned him there was a "10,000 fine" for letting kids play the slots. A freeze frame captures young Harper making a silly "Oh!" face as the guard mentions the fine.
Check out the video over at the Huffington Post. As Barney Stinson would say, it is legen -- wait for it... -- dary.