Mystery pole
The mystery pole is a fire pole within the Bikini Bottom Fire Department that SpongeBob rides in the episode "Firehouse Bob."
Description
It looks exactly like the other fire poles in the Fire Department, but with several caution signs and borders around it. It leads to several other dimensions and chaotic locations, and never goes to the same place twice.
Role in episode
Despite Larry's warning, SpongeBob goes down the pole, which leads him to dark void with several people and creatures screaming, through a human firefighter's ears, and a dancing alien. He then goes through several science tubes, slides past a group of people partying, a monkey, and eventually makes it to the top of a rollercoaster. He slides back down again, knocking off a person who is standing on the pole, to finally an imploding planet. SpongeBob returns back to Bikini Bottom, mortified.