First, Marshall claimed that a man held him at gunpoint and stole his wallet. This frightened Lily. Then, he claimed the mugger was naked. This did nothing to assuage Lily's fears and soon enough she was hanging out at the firing range with Robin and telling Marshall that she wanted to get "a cute little pink gun" to match her new strappy sandals. Then, Marshall said that he had been lying because the truth was too embarrassing. So he claimed that a monkey at the zoo had stolen his wallet. Of course, this made Lily calm down and the entire gang shared a huge laugh at Marshall's expense. He got defensive and everyone else got laughing so hard they couldn't stop. Then, Robin found out and she wanted to interview Marshall for her very early newscast. Marshall went along until he found out that his story was going to go on the national news. This is when he "came clean" and claimed that he made up the monkey story to keep Lily from freaking out. No one was sure what to believe, but Barney decided that he'd rather believe the lie because it was a better story. By the end of the episode, no one knew the truth and everyone was left to believe whichever story they chose.
Meanwhile, Barney was busy telling girls that he was Neil Armstrong, the
How I Met Your Mother airs Mondays on CBS. If you missed last night's episode, watch it for free at cbs.com.