Ron Dell'Osso is the king of splat when it comes to pumpkins. Nearly 100,000 people will make a pilgrimage to his family's pumpkin patch during October starting Saturday. Sure, they enjoy the 40-acre corn maze as well as the numerous wholesome activities such as tricycle races and hay rides. And they probably will end up buying a pumpkin or two. But the real draw are 10 pumpkin blasters. The air-powered weapons of mass pumpkin destruction can hurl a miniature gourd at speeds in excess of 110 mph for upwards of 200 yards. The quarter-inch steel targets that shooters aim at...