ZombieMod 4.0

ok well someone i was just talking to made me confused so i ask which is the version that lets yuo get unstuck from furniture and where do we get it? and what is the latest version

odd because one server i was in, it allowed you to get free from furniture also..is it a mod that does that, that isnt included in zombie mod?

!zstuck isnt working on my clan server the person who owns it said its a mod but im not sure so can someone help me?