If you eat enough candy, like anything else, it can be lethal. Given that the average fun-size candy bar has 9.3 grams of sugar and the average American weighs about 180 pounds, you would have to consume 5.4 pounds of sugar, or 262 fun-size pieces of candy at one sitting, to reach a dose that would kill half of such gluttons. Please, be careful and eat defensively! Happy Halloween.