Not even a show-stopping injury can slow Maksim Chmerkovskiy. Just seconds into his rumba routine on Monday night's "Dancing with the Stars," a look of pain washed over the pro dancer's face as he fell to the floor and nearly dropped partner Kirstie Alley.

Chmerkovskiy's thigh appeared to have given out on him mid-step, but he quickly composed himself and continued the routine while trying – unsuccessfully – to hide the painful expression on his face. Despite being in a noticeable amount of pain during the commercial breaks, Chmerkovskiy told UsMagazine.com it was "no big deal.""I'll be fine," the 31-year-old said. "It'll take a stretcher to get me out of here! I'll be okay.

While the cause behind his mysterious injury remains unknown, Chmerkovskiy is adamant it won't deter his plans to win the show's mirror ball trophy. "Whatever it is, it's going to have to wait until May 24th. After the finale!" he told the mag. As for Alley, the 60-year-old actress admitted she was "so scared" before the on-camera tumble.

"I knew something was wrong. But then he got up and he was fine, and I thought, 'So what?' " Alley told Us.  "[Maksim] just controlled me," she added. "I stood up and said 'I don't know where we are' and he said, 'Just follow me.' So I did!" The pair continued their performance to "Somewhere Over the Rainbow" without any more hiccups, which earned them a score of 21 out of 30. But receiving a higher score doesn't seem to be Alley's focus on the show.

"When I signed up for this I signed up for live TV, whatever the hell that means," the actress said. "For me, this is a story. I dance, I get an 8, is that a story? No. I'm not saying I don't care about our scores, I do, but I don't give a f--- if we fall down!" She may not care about taking a spill on the dance floor, but Chmerkovskiy swears it was a one-time occurrence. "To all the fans...I'm sorry!" he tweeted after the show. "It will never happen again and I will never 'fall'!"