Minecraft wiki entry for Barrel, associated text: In the 2022's April Fool's update, a barrel can be thrown onto a player and make them appear as if they were "wearing" or "hiding" under the block.
While wearing a barrel, the player's vision becomes largely obstructed and they can see only through a narrow window; when sneaking, it will disguise the player as a barrel block, showing resemblance to the popular online game Prop Hunt.