This generates melon slices, which are then crafted into melon blocks. A single lever is used to control collection of melon slices. When you flip the switch, melons rain onto the ground, creating a lot of lag. I built this for a survival map, but I don't think I'll finish it. If I do, it'll probably be a snow generator instead of this.
Thanks! :]

Additional Notes

The MCedit schematic is from the old version of MCedit.