You forgot El Launcho Grande from Moriarty NM, which tipped the balance of power in the great pumpkin wars of the late 90's.
Punkin' chunkin' is in another category entirely, whether in the mechanical or pressure vessel propulsion classes.
But there's nothing as grand as a great siege engine flinging it's projectile downrange, particularly when that projectile is a piano. [Nothing as grand, get it?] While pumpkins are interesting and fun to watch in their own right, the folks in England who tired of using a Volkswagen Beetle as their target and are now busy with a design that will use it as the projectile instead offer hope that such developments will be as worthy of interest in the coming century as in the last one.
Beware, however. If ever there were weapons who possessed their users and operators into greater and greater excess and flights of folly, these are them. Kids, please don't try this at home with family pets or baby sister. Unless you think you can set a distance record, of course. Meoooooooooooooooow!
-archy-/-