With the competition down to the final two weeks, tension was running high on Dancing with the Stars, and seemed to overwhelm one top contestant.
A seemingly minor misstep at the end of a solid routine left Katherine Jenkins in tears. The question on every concerned viewer's mind was why?
Their salsa – their second routine of the night – saw the opera singer stumble, a mistake that barely resonated with the judges, but left her bawling on stage:
"That was just fantastic," said Carrie Ann Inaba, who awarded a nine. "I'm sorry at the end. But I just love seeing you push your boundaries."
The other judges also gave her nines, but with the finals a week away, the miscue left poor Jenkins in tears. "I'm sorry, Mark," she told her partner.
It was unclear what exactly caused the crying from Katherine - who also scored a 29 in her first dance, a quickstep - until later in the evening.
Afterward, she was heard saying, "I don't know what happened." She later Tweeted: "I'm with the Doctor, he says it was a reflectorical spasm in my lower back."
Nerves and pressure may have contributed to her tears, but no one realized at the time how much physical agony she was in. What a fighter.
In any event, she's still in this thing, as no more than three points separate all the contestants on a night that saw near perfection in the scoring.
"This is going to be the best semi-finals ever," proclaimed Len Goodman.