By Veronika Bondarenko The Double Down was recently spotted at KFC restaurants again. While fast food is almost always meant to be indulgent, there are the menu items that go beyond what a human being can reasonably consume and cross the line into heart attack-inducing. A Yum! Brands franchise, Kentucky Fried Chicken has been the master at creating and marketing this type of product — from the fried chicken in-between two donuts “Zinger” and the flower bouquet where roses are interspersed with pieces of chicken launched in time for Mother’s Day. Such items are, most often, limited-time offers…