This new Minecraft mod adds in a new kind of tool to the sandbox game. Rather than pulling from something that doesn't exist, this is another mod that brings in a weapon from another game, and then ...
Someone has managed to take the iconic gravity gun from Half-Life 2 and put a blocky version of it into Minecraft, with a video showing it working as intended. As the most successful indie game of all ...
/gravity set_base_direction <direction> [entities] sets the base gravity direction. (The base direction can be overridden by other things including effects, gravity anchor and gravity plating).