Fingers crossed the celebrities taking part in BBC1's show Tumble have taken their six-weeks of intensive training seriously.
Legendary gymnast and Tumble judge Nadia Comaneci believes the new Saturday night show that puts celebrities through the rigours of gymnastics routines is one of the toughest competitions on TV.
With Mr Motivator already needing surgery after dislocating his knee in rehearsals, Tumble looks set to live up to its name...
"We've already seen a lot of bruises and injuries in training!" says Nadia, who won five Olympic golds in 1976 and 1980 and scored the very first perfect 10 score at the Montreal Olympics. "It's very challenging because all the celebrities are going to be doing some very difficult, complex routines."
In the first week, they're attempting either an acrobatic floor routine or the 'aerial hoop', suspended high up the studio floor. But it's the beam exercise coming in later weeks that may prove toughest...
"When they first walked on the beam they all said, 'that's so narrow'! They couldn't imagine how we gymnasts could ever do it," says Nadia. "But when your body's fit it's easier to attempt gymnastic skills. Big accidents can happen in gymnastics, especially when you're not fit physically, so the celebrities are all feeling excited, but intimidated at the same time!"
Tumble starts this Saturday on BBC1 at 6.30pm
