Cosmic Skateboard

Type	Pet summon
Use time	20 (Very fast)
Tooltip	Summons an alien skater; 'Kickflips are a lot easier in Zero-G!'
Rarity
Sell	5 GC
Research	1 required
Buff	Alien Skater(Desktop, Console and Mobile versions)
Buff tooltip	How do you do, fellow humans?
Use	https://terraria.wiki.gg/wiki/File:Item_2.wav

Desktop/Console/Mobile-Only Content: This information applies only to the Desktop, Console, and Mobile versions of Terraria.

Master Mode-Only Content: This information applies only to Master Mode and Master Mode worlds.

The Alien Skater flying with a hoverboard.

The Cosmic Skateboard is a Hardmode, post-Golem pet-summoning item that spawns an Alien Skater to follow the player around. When the player is far enough away or in midair, the Alien Skater turns its skateboard into a rocket-powered hoverboard to catch up to them. The Cosmic Skateboard has a 1/4 (25%) chance of dropping from the Martian Saucer in Master Mode.

Trivia

The Alien Skater's buff tooltip, "How do you do, fellow humans?", is a reference to a cutaway gag in the American television sitcom 30 Rock, in which Lenny Wosniak walks up to a group of teens and asks "How do you do, fellow kids?" while holding two skateboards.