Lobbed-shot plants, sometimes refered to as catapult plants, are plants which launch projectiles in an arc through the air, allowing them to attack zombies on the roof. The Cob Cannon is not a true lobbed-shot plant, but it is the upgrade of one (the Kernel-pult) and launches its cobs into the air. Plants like the Spikeweed and Spikerock can also bypass held defenses such as ladders and screen doors, rendering some of the more powerful zombies defenseless.