getgenv().Sky = true --disable or enable the antilock
getgenv().SkyAmount = 90 --how far it should be
 
game:GetService("RunService").heartbeat:Connect(function()
    if getgenv().Sky ~= false then 
    local vel = game.Players.LocalPlayer.Character.HumanoidRootPart.Velocity
    game.Players.LocalPlayer.Character.HumanoidRootPart.Velocity = Vector3.new(0,      getgenv().SkyAmount,0) 
    game:GetService("RunService").RenderStepped:Wait()
    game.Players.LocalPlayer.Character.HumanoidRootPart.Velocity = vel
    end 
end)