BRENTWOOD - The founder of a fitness program surprised students at a Brentwood middle school today, encouraging them to maintain healthy and active lifestyles. Shaun Thompson, founder of Insanity Fitness, made his way to South Middle School. He says his visit was spurred by teacher Josh Rotolo's claim of losing 149 pounds using his program. Thompson says he considers himself a liaison for fitness and that he wants children to realize the importance of exercise. South Middle School faculty started a healthy eating and exercise program three years ago.