sentence:  A man is sitting on a workout bench while a crowd watches. sentence:  People in the crowd are taking photographs and video. sentence:  Two announcers talk about boxing. sentence:  The man begins doing situps on the bench. sentence:  The man gets off the bench and folds a towel on the ground. sentence:  The man grabs a crunch wheel and begins to do rolling crunches. sentence:  The man then pauses briefly to acknowledge the crowd. sentence:  The man then returns to doing his exercise.