NBC chose not to air the Opening Ceremony live today. Instead, they're showing it on tape delay, so it can appear in the United States in primetime.
But not everyone got the memo. Some thought that the Opening Ceremony was being broadcast to them live on NBC.
It's certainly possible to get into the event and forget it's not live, but that doesn't mean you have to tweet about it. Nonetheless, these 13 people did, while the coverage aired in the U.S. from 7:30 p.m. Eastern Time on.