Not much stops that exercise class at Peak Fitness in the Prairie Shopping Center from getting-'er-done when it comes to burning off calories & shaping up. Case in point: Around 9:30 this morning, the group was going through its stretching and workout routine when the fire alarm sounded, set off by the smoke from welding occurring nearby. Peak Fitness cleared out. The Northern Lakes Fire Department arrived to find the class working out in the parking lot shared with Discount Theater off of Centa/Hayden.