Salads are notorious for hidden fat because of the dressing.
Salad dressing may contain up to 20 grams of fat per serving. Most people dump 3 or 4 servings of dressing on their salad. That turns a low fat, low calorie salad into a 800 calorie meal with about 80 grams of fat. That's almost equivalent to a double cheeseburger. Request dressing on the side when eating in restaurant and put a half serving in yourself.