HIMYM Season 1 Episode 8: The Duel #howimetyourmother #himym #robin #tedmosby #barneystinson #marshalleriksen #lilyaldrin #robinscherbatsky #neilpatrickharris #lemonlaw #lemon Meanwhile, Barney has created a revolutionary idea in the dating world: The Lemon Law. Similar in nature to lemon laws for used cars, Barney's new lemon law for dating gives a person five minutes to decide if there will be a second date or not. They can call the date off for any reason in the first five minutes, avoiding bad dates. Barney goes on to say that it will become "a thing" after "lemon-lawing" two different women on dates. Robin argues that it takes longer for people to get to know each other, so she challenges Barney by taking Kevin, a nerdy guy obsessed with Star Trek, on a date. Barney calls her to try to get her to use the lemon law, but she refuses. The guy asks if it was a fake call from the hospital, and she tells him that she would never do that. Only a few minutes later, she gets a real call from the hospital telling her that Marshall has accidentally stabbed Lily, and leaves, with Kevin believing that she is indeed using a fake excuse to get out of their date, and tells Robin that she has no honor (in Klingon). At the hospital Barney reveals that his lemon law is now "a thing," as he had just been "lemon-lawed" by a girl earlier that night. He also regrets not calling it Barney's Law so as to get some name recognition or fame.