Smirnoff and Jones were rehearsing a dance routine on Dancing with the Stars' ballroom stage on Sunday when Smirnoff was injured during a flip, People reported Monday.
"I was flying over Jacoby and I didn't get down enough so I landed right on my jaw," Smirnoff explained in a Dancing with the Stars video clip obtained by People.
"I tried to get up and I couldn't -- that scared me."
Smirnoff was then taken to Cedars-Sinai Medical Center for possible whiplash and a dislocated jaw, according to a People source -- putting her status for Monday night's Dancing with the Starssemifinals performance show in doubt.
However, Smirnoff pronounced herself ready to go and insisted the show must go on during a Twitter posting on Monday afternoon.
"Hey guys! I did go2 the hospital +am still a bit sore but I'm going 2 b ok+ not dancing isn't an option. Excited4 2night +LOVE our dances," she tweeted.