Florida -- 34-year-old Dave Pancallo of Cooper City is a man with Down syndrome - and that's that to the outside world, according to miamiherald.com.
But to those who take goju karate classes, he is Mr. Dave -- the person who helps lead twice weekly workouts for the adults and children.
Pancallo is a stern brown belt assistant teacher who offers no mercy or apologies for his regimen, leading his group in a series exercises that sometimes leave students gasping for air.