"When she was a child, gymnast Nadia Comaneci could be naughty. At a store, she tried on a pair of roller skates. Because she wanted the roller skates so much, she skated out of the store, forcing her father to pay for them. In addition, one day she stayed outside until after dark, playing, and her parents worried about her.
When she finally came home, her father spanked her once, then made her kneel on cracked walnut shells for three hours—so she would be as uncomfortable as he had been waiting for her to return home."
Photo of Nadia:
http://www.vancouver2010.com/images/Features/1976_Nadia.jpg
More photos:
http://www.nadiacomaneci.com/index_files/photos.htm
Actually, I missed that this was already in the "Site Visitor's Contributions" section, contributed by Anna several years ago (but the SF&R site doesn't include as much detail).
From the SF&R site:
On page 11 of the legendary Romanian gymnast`s book "Letters To A Young Gymnast" (published December 2003), Nadia wrote: "My father only spanked me one time in his life." "He spanked me once with his belt on my behind". This was after she came home late.