How I Met Your Mother

As Fast As She Can - S4-E23

Revealing mistake: When Lily walks into MacLaren's at the end, you can see her pregnant belly bump due to Alyson Hannigan being pregnant during filming. Lily was not pregnant at any time during this season. Even if she did try to cover it up with her coat, the belly bump is still visible.

xx:xx:xx

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Quotes

Barney: Suit up!

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Mistakes

Lily and Marshall mention that they've been using the same toothbrush ever since they've been together, but in the 14th episode of the 1st season, "Zip, zip, zip", Marshall and Lily are simultaneously brushing their teeth with a tooth brush each (before Ted and Victoria get home).

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Trivia

When Ted and Robin are at the restaurant, they are accidentally sent a champagne glass with an engagement ring in. A man then claims the ring and proposes to his girlfriend. This couple really did get engaged on the show - the guy set up the surprise proposal, as his girlfriend thought they were just there as extras.

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