It is a small island, with many purple spikes and shards sticking out of it. SpongeBob did a dangerous stunt with a nervous Patrick that involves them getting catapulted on a giant arrow straight into this place. Larry tried to save them by grappling on to the arrow with a lifesaver, but he came too late and the three of them were badly injured and sent to the Bikini Bottom Hospital. SpongeBob then gets chased out by a angered Larry.
Role in series
SpongeBob was trying to "live like Larry," something Patrick regretted attempting. He planned to catapult himself into the lagoon, not knowing the angle of trajectory would land them in the reef. Larry tried to save them by grappling on to the arrow with a lifesaver, but he came too late. They all ended up in the hospital, though it is later revealed that SpongeBob wanted to land there.