Giant pumpkins

It takes a special kind of person to really get into giant vegetables. Giant pumpkins are probably the most popular, but there are people who grow giant cucumbers, onions, celery, zucchini, and every other type of veg. It's a huge dollar and time investment and really so, at the end of the season someone can say they grew a sixteen pound onion. I really don't understand it. I'm going to go work on my giant ball of twine and try to make sense of it.