Mineable Falling Block

If a falling block entity is moving slowly enough, the player should be able to kill it by looking at it and holding down the "Mine Block" key.

The entity's model should gain a growing mining animation, and eventually be destroyed into item form.

The type of tool, it's material, and it's enchants, and the player's status effects, should all contribute to how fast the player can kill the entity, with a "breaking" time as close as possible to if it were a block.