[Cosmic Tortoise]

Actually the things that Ace can do with the grappling hook is actually against the rules since it is exploiting the grappling hook

Two others do the same things Ace does, IE, gliding across the map after a grapple.

Another exploit was seen last night on the Heaven Map.  Grapple a person.  Step into a teleport.  You teleport normally, the grappled person is yanked across the map and smashed into the ground.