Giant

Giants are unused, over-sized mobs that look like zombies. They currently have no purpose other than decoration.

Plus they spawn when people make Minecraft videos

Drops
Giants drop 5 experience when killed.

Spawning
Giants require a light level greater than 11 and less than 8. This effectively makes it impossible to make them appear naturally or through spawners.

Commands
Giants can be spawned using commands such as.

Behavior
Giants are close to 12 blocks tall, and use a six times enlarged zombie model.

Giants currently have no AI. The consequence of this is that they always face south when summoned and stay that way, never wandering, turning their head, chasing the player, or responding to damage except for taking knockback. Their viewing direction can only be changed with commands.

Giants are in the Xbox 360 and Xbox One editions, although they require external modifications for their egg to be placed in the player's inventory.

Data values
Giants have entity data associated with them that contain various properties of the mob. Their entity ID is.

Trivia

 * Since giants need to have a light level both less than 8 and greater than 11 to spawn, they don't spawn from monster spawners. However, this spawn condition can be bypassed with a custom spawner, if it attempts to spawn an entity with valid spawn conditions riding a giant.
 * If you name a giant using a name tag, its name will appear inside its head.
 * Giants share the exact same model as the zombie. This means that changes made to the zombie model change the giant's as well.
 * Notch removed the giants spawning capabilities because "they are too overpowered". He did not remove them entirely because "they are just too cool to remove".
 * If a giant is riding a minecart, it hovers way above it.
 * If a mob is riding a giant, unless it's a very large slime or magma cube, a ghast or the ender dragon, it is completely hidden from view by the giant's head.
 * Giants are damaged by potions of harming despite the fact that they use the Zombie model which is an undead mob.
 * Giants have the same hurt sound as the player does.
 * The Giant's head and torso are not included in its hitbox, meaning hitting it in those areas will not hurt the Giant.
 * Iron Golems are hostile towards Giants

Gallery
Riese Gigante Géant Óriás ジャイアント 거인 Reus Gigant pt-br:Gigante Гигант 巨人