AMERICAN FORK, Utah A crowded restaurant, a man making frightening statements, and innocent bystanders not quite sure what to do.It happened Sunday evening at the Olive Garden in American Fork. Several families were there for what they thought would be a quiet, Sunday meal.Thats when suddenly, a man walked in making very loud and very ominous threats.He just kept saying, 'Nobody is leaving here alive! Nobody is leaving here alive! said Mercedes …