If the object is impossible to move, it simply can't move. The unstoppable force would kinda 'noclip' through it if it can only move in one direction without the binds of physics, therefore, the impossible to move object stays where it is.
They are not random files, they are plugins, which means if you have a Minecraft Server, you can plug in the 'plugins', (hence their name) to add content to the game. these include the Assassins plugin, the Hitmen plugin, etc.
