Java Edition:B Creative Mode
In version 11w49a (1.1 Snapshot), pressing B would toggle the player between Survival and Creative mode, this occurs even if cheats are turned off. This allows the player to fly, be invincible, break unbreakable blocks, and access the Creative inventory for several unobtainable items and unlimited resources. This does not save when updating or reloading the world, and does not work on 11w49a (1.1 Snapshot) servers and will cause the player to de-sync
Uses
This feature can be used for a wide variety of things. The player is able to use flight to travel long distances quite quickly, grab an infinite amount of resources from the Creative inventory, instantly break any block in the game including unbreakable blocks, and the player could obtain many items which, at the time, were unable to be gathered in Survival mode, these are: