The USA-Switzerland curling match was very tight. After the Swiss got out to a 4-0 lead, the USA came storming back, and the tenth (final regular) end came down to a measurement, which the Swiss won to tie the match and force an extra end. So when the live video came back from the commercial, they started showing a hockey match instead, and when I tried to reload the curling, I got an "Application Error" message. I have a bad feeling that NBC set things up so that when the time scheduled for the match ended, regardless of when it finished, they cut it off. Sigh.
Update: I checked the replay, and they cut it off as well. Someone was asleep at the switch. I sent a feedback complaint.