I've been trying to make a gliding script, first time gliding works, but then when you jump you start flying up really fast

It's supposed to be when you press "space" while in the air, you start gliding, but then it makes some weird results

local uis = game:GetService("UserInputService")
local char = game.Players.LocalPlayer.Character

local mass = 0
for i, v in pairs(char:GetChildren()) do
	if v:IsA("BasePart") then
		mass = mass + v:GetMass()
	end
end

local count = 0
local bv = Instance.new("BodyForce")
uis.InputBegan:Connect(function(input, gpe)
	if not gpe and input.KeyCode == Enum.KeyCode.Space and count == 0 then
		if char.Humanoid:GetState() == Enum.HumanoidStateType.Freefall then
			bv.Force = Vector3.new(0, (mass * workspace.Gravity) ,0)
			bv.Parent = char.Torso
			count = 1
		else
			bv.Force = Vector3.new(0, 0, 0)
			count = 0
		end
	end
end)
AnonymousEdited