How does this code bypass Voiliax / Oxcool1's Script Builder sandbox?

Voiliax / Oxcool1's Script Builder contains a strong sandbox which keeps track of all scripts ran and allows them to be stopped by virtually anyone if they wish so by them simply using the command "g/nos/all nol/all".

Now, some people (including me) thought this was quite intrusive and annoying, so there has been a "breakout" written. For the sake of curiosity, I'd be thankful if some genius from this forum could explain how the following piece of code works.

if game.PlaceId == 178350907 then 
    script.Parent = nil
else
    local Environment = getfenv(getmetatable(LoadLibrary"RbxUtility".Create).__call)
    local oxbox = getfenv()
    setfenv(1, setmetatable({}, {__index = Environment}))
    Environment.coroutine.yield()
    oxbox.script:Destroy()
end

Thanks guys!