How would I size a player without killing them?

First of all, this is in a local script in StarterPack.

local jun = script.Parent.Parent --I always use this lol
local Char = jun.Character

function Cheese()
Char["Left Arm"].Size = Char["Left Arm"].Size * 2
Char["Right Arm"].Size = Char["Right Arm"].Size * 2
Char["Left Leg"].Size = Char["Left Leg"].Size * 2
Char["Right Leg"].Size = Char["Right Leg"].Size * 2
Char.Head.Size = Char.Head.Size * 2
Char.Torso.Size = Char.Torso.Size * 2
end

jun.Chatted:connect(function(message)
function Form(jun, message)
if message == "Form" then
Cheese()

end
end)

So the problem is that when the player gets resized, they die immediately.

An answer would be much appreciated. Thanks in advance!

(Also, I'm using a different script with the same idea. Same spot, LocalScript, etc. It does the same thing. So sorry if I missed an extra "end" or something >.< )

-- Possible Fix
local jun = script.Parent.Parent --I always use this lol
local Char = jun.Character
Char.Humanoid.Health = 150

function Cheese()
Char["Left Arm"].Size = Char["Left Arm"].Size * 2
Char["Right Arm"].Size = Char["Right Arm"].Size * 2
Char["Left Leg"].Size = Char["Left Leg"].Size * 2
Char["Right Leg"].Size = Char["Right Leg"].Size * 2
Char.Head.Size = Char.Head.Size * 2
Char.Torso.Size = Char.Torso.Size * 2
end

jun.Chatted:connect(function(message)
	function Form(jun, message)
		if message == "Form" then
			Cheese()
			Char.Humanoid.Health = 100
		end
	end
end)