Hennie Muller played no.8 for the Boks. Used to be legendary for "running the backline down", as it was called. Fearsome speed and tackling ability. His nickname was "windhond", which translated means greyhound. So that training drill was probably a speed drill, with some stamina work thrown into the mix. Also possibly to make the bloke`s name like a curse over in NZ, seeing as he captained the 1949 Boks to a 4-0 whitewash over the AB`s.
@ The Bokke- why not pop over the hall of fame section and write a nomination article on Hennie? There are excellent guidelines set out. And he deserves a mention.