The market trader from Derbyshire takes over the casting for Team Pheonix's '80s-themed workout after being pushed into the role by Jade Nash.
"You lead them because you know it all," she tells him. "I'm not being rude... you know about the dances. You lead and we'll just observe."
Relishing his new position, Corbally enthusiastically demonstrates to a sweatband-wearing fitness fanatic the moves he will need to perform, which include the "funky lunge" and some Lady GaGa-esque clawing.
Frustrated at teammates Nash and Tom Gearing taking a back seat, Corbally later moans to the cameras: "They were like if you know it all, you do it. It's not a case of who knows it all; we should all know it all."
The Apprentice airs on Wednesday night at 9pm on BBC One.
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