bypass jump power

plr = game:GetService('Players').LocalPlayer
rs = game:GetService("RunService").RenderStepped
function onKeyPress(inputObject, gameProcessedEvent)
   if inputObject.KeyCode == Enum.KeyCode.Space then
       plr.Character.Humanoid.JumpPower = 80
       wait(rs)
       plr.Character.Humanoid.JumpPower = 50
   end
end
game:GetService("UserInputService").InputBegan:connect(onKeyPress)