No visible parent?

I found this function in one of crazyman's scripts.

local mover = (function()
    local move = script.Movement:Clone()
    script.Movement:Destroy()
    return move
end)();

the Movement script that this refers to contains code that use CFrame to move a brick when it's touched by a character. Even after I condensed that code to just one line of CFrame movement it still works when I touch it.

Apparently what the function above does is that it creates a clone, and executes that cloned script... Somewhere? Because after :Destroy is called the actual source called Movement is gone, and the entire model seems to run a script from nowhere! It doesn't place it in ServerStorage, or ServerScriptService, nowhere. But IT STILL RUNS?!

BUT, when I replace Movement with my own code which should theoretically still work on it's own:

while true do
    script.Parent.Flash.Enabled = true
    wait(1)
    print("LIGHT FLASHED")
    script.Parent.Flash.Enabled = false
end

and the original function is replaced with:

local flasher = (function()
    local flash = script.FLASHING:Clone()
    script.FLASHING:Destroy()
    return flash
end)();

When I make it so that crazyman's script is now the Parent of my script which shouldn't break it, but the flashing doesn't start at all. It's like the cloning script knows which is the original and which is not! Also, the fact it is not a child of anything makes it even more confusing.

I'm hoping to crack is problem because a working script which code can't be observed in explorer/Studio can be very beneficial in deterring some exploiters from being able to steal your code.