Seemingly spontaneous aerobics astounded lunch-goers across the state yesterday when flash mobs broke out at 12:10 p.m. on the streets of Denver, Greeley and Grand Junction. More than 100 flash mobbers exercised their enthusiasm for healthy eating and active living in each city when they suddenly disrobed to display retro, 1980s-inspired workout gear and performed a coordinated aerobics routine. Several of us participated in the Denver mob; try and spot us!