Sonny Gutierrez has been in the boxing ring for more than 30 years. In that time, he's amassed six national titles, competed in nearly every amateur tournament, and fought on the USA Boxing team. Perhaps his crowning achievement, however, is helping transform people's lives at Sonny's Boxing Gym. Here, he and fellow instructors teach trainees how to throw punches and how to respond to a punching bag's witty insults. Classes include different levels of boxing, personal training, and a kids' antibullying program.