Here's another article about the Gumboot show:

"GUMBOOTS is an electrifying 90 minutes of pure entertainment that you will love! Twelve of South Africa's finest performers explode onto the stage in an exhilarating extravaganza of dance, song and the infectious energy of African rhythm.

Bare chested, sexy and supremely talented these singers, actors, dancers and musicians leave their audiences inspired and in awe by their unique dance routines, boundless energy and sheer physicality. Hand clapping, toe tapping and definitely boot slapping, GUMBOOTS excites, entertains and enthrals in a unique theatrical celebration of life.

With original and contemporary songs and dancing like you've never seen before, GUMBOOTS injects the rich harmonies embodying the spirit of Africa into a dynamic show which captivates the hearts and emotions of every audience.

GUMBOOTS is based on the South African tradition of Gumboot Dancing. In the nineteenth century, South Africa's mine workers were forbidden to speak during the long days underground. Instead, the workers communicated with each other through movement and the rhythmic slapping of their Wellington boots. Over the next hundred years a new language of dance was born"...

http://www.gumbootsworldtour.com/