local player=game.Players.LocalPlayer
local mouse = player:GetMouse()

local bodythurst=Instance.new("BodyThrust", player.Character.HumanoidRootPart)

local speedy=false
mouse.KeyDown:connect(function(key)
if key:byte() == 48 then
bodythurst.force=Vector3.new(0,0,-4000)
end end)