Recoil Zombie Insta Kill script

local env = getsenv(game:GetService("Players").LocalPlayer.PlayerScripts.Shockwave)
local dialog = env.Dialog
local callServer = debug.getupvalue(dialog, 2)
local hook

hook = hookfunction(callServer, function(...)
   local t = {...}

   if t[1] == "YWHY" then
       for i = 1, 100 do
           pcall(hook, ...)
       end
   else
       return hook(...)
   end
end)