Ted: It was me. I started this. If I hadn't picked up that penny, we wouldn't have gone to get hot dogs all the way across town.
Robin: And we wouldn't have seen that wedding dress store, Lily wouldn't have wanted to camp out there, and I wouldn't have needed a nap at your apartment the next day.
Ted: Marshall wouldn't have broken his toe. Barney wouldn't have run the marathon. I wouldn't have jumped that turnstile, gotten arrested, had that court date...
Robin: And we would have made our flight. I don't think we can go back any further than that unless you know who dropped the penny.
Ted: I wish I did. Though that person's already been punished enough, losing a sweet penny like that.