When the guys are at the tailor and the tailor speaks a foreign language, Marshall says he's speaking Ukrainian. The tailor is actually speaking Russian, and he doesn't say that Ted's moping is disrupting his process as Barney claims he understands. He actually says, "Boys, you're in my way. I need to finish this job."
At 13:00 in to the episode, Victoria hands Lily one of those front window dresses. She then turns and walks to robin and casually starts fake cutting herself a piece of cake, and taking a bite from the one that already was on the plate before she got to the table.
When Ted is removing the pan of cupcakes from the oven, he holds the oven door down with his bare forearm showing that the oven isn't hot.