Changing Player size kills them sometimes? (r15)

I've got two scripts that change the scale of the players size. The 1st script changes it to 2, and the 2nd script changes it to 4. Sometimes they will kill the player when they get bigger or smaller. Any idea why?

1st script:

local Player = game.Players.LocalPlayer
local mouse = Player:GetMouse() 
local lastUse = 0;
local God = Player:waitForChild("Stats").MinorGod
local lightning = game.ReplicatedStorage.MinorTransform.Lightning
local char = Player.Character or Player.CharacterAdded:Wait()
local hum = char:WaitForChild("Humanoid")
Player.CharacterAdded:connect(function(character)
        char = character
    hum = char:WaitForChild("Humanoid")
end)
if not hum.Parent then
    repeat wait(0.2) until hum.Parent
end

-- HeadScale = 1.8, everything else = 2


local function GodMode(key)
	local Key = key:lower()
	if key == "r"  and Player.NonSave.GodOn.Value == false and  tick()-lastUse > 5 and Player.Character.Humanoid.Health == 100 and God.Value == 1 then	
	    lastUse = tick(); 
		Player.NonSave.GodOn.Value = true
		Player.Character.Humanoid.WalkSpeed = 0
			local animTrack = hum:LoadAnimation(script.Pose)
			animTrack:Play()
			--clone effects
			local a = lightning:Clone()
		    a.Parent = Player.Character.UpperTorso
		    local b = lightning:Clone()
		    b.Parent = Player.Character.LeftLowerArm
		    local c = lightning:Clone()
		    c.Parent = Player.Character.LeftUpperArm
		    local d = lightning:Clone()
		    d.Parent = Player.Character.RightUpperArm
		    local e = lightning:Clone()
		    e.Parent = Player.Character.RightLowerArm
		    local f = lightning:Clone()
		    f.Parent = Player.Character.LeftLowerLeg
		    local g = lightning:Clone()
		    g.Parent = Player.Character.LeftUpperLeg
		    local m = lightning:Clone()
		    m.Parent = Player.Character.LeftFoot
		    local o = lightning:Clone()
		    o.Parent = Player.Character.RightLowerLeg
		    local h = lightning:Clone()
		    h.Parent = Player.Character.RightUpperLeg
		    local i = lightning:Clone()
		    i.Parent = Player.Character.RightFoot
		
		    local yellow = game.ReplicatedStorage.MinorTransform.Yellow:Clone()
		    yellow.Parent = Player.Character.UpperTorso
			wait(2)
			
		
		
		--create part
		
--		Player.Character.Humanoid.MaxHealth = 150
		wait(1)
--		Player.Character.Humanoid.Health = 150
		
        local explode = Instance.new("Part")
        explode.BrickColor = BrickColor.new ("Bright violet")
        explode.Material = "Neon"
        explode.Anchored = true
        explode.CanCollide = false
        explode.TopSurface = "Smooth"
        explode.BottomSurface = "Smooth"
        explode.Size = Vector3.new(5,5,5)
        explode.Parent = game.workspace
      
        explode.CFrame = Player.Character.UpperTorso.CFrame

        local me = Instance.new("SpecialMesh")
        me.MeshType = "Sphere"
        me.Scale = Vector3.new(2,2,2)
		me.Parent = explode
 
        local fix =  game.ReplicatedStorage.EmergencySkillRemove:Clone()
	    fix.Parent = explode
	
	  	
		
		local sound = Instance.new("Sound")
	sound.SoundId = "http://www.roblox.com/asset/?id=506383970"
	sound.Parent = Player.Character.UpperTorso
	sound.Volume = 4
	sound:Play()
	
	
		
		--set size
		Player.Character.Humanoid.BodyDepthScale.Value = 2
		Player.Character.Humanoid.BodyHeightScale.Value = 2
		Player.Character.Humanoid.BodyWidthScale.Value = 2
		Player.Character.Humanoid.HeadScale.Value = 1.8
		
		
		 --explode
	
	
	
	
	  for expand = 1,50 do
		me.Scale = me.Scale + Vector3.new(0.2,0.2,0.2)
		explode.Transparency = explode.Transparency + 0.02
		wait(0.0001)
	        end	
	local sound = Instance.new("Sound")
	sound.SoundId = "http://www.roblox.com/asset/?id=130818250"
	sound.Parent = explode
	sound.Volume = 4
	sound:Play()
	
		  wait(4)
		  animTrack:Stop()
		
		Player.Character.Humanoid.WalkSpeed = 16
		--remove effects
		game.Debris:AddItem(a,0.1)
        game.Debris:AddItem(b,0.1)
        game.Debris:AddItem(c,0.1)
        game.Debris:AddItem(d,0.1)
        game.Debris:AddItem(e,0.1)
        game.Debris:AddItem(f,0.1)
        game.Debris:AddItem(g,0.1)
        game.Debris:AddItem(h,0.1)
        game.Debris:AddItem(i,0.1)
        game.Debris:AddItem(o,0.1)
        game.Debris:AddItem(m,0.1)
        game.Debris:AddItem(yellow,0.1)
        game.Debris:AddItem(explode,2)
        game.Debris:AddItem(me,2)
       
     
		
	end
end


local function GodModeOff(key)
	local Key = key:lower()
	if key == "r"  and Player.NonSave.GodOn.Value == true and  tick()-lastUse > 5 and  God.Value == 1 then
		lastUse = tick();
		
		Player.Character.Humanoid.WalkSpeed = 0
	
		local animTrack = hum:LoadAnimation(script.PoseOff)
			animTrack:Play()
		
		
		local Down = Instance.new("Part")
        Down.BrickColor = BrickColor.new ("Bright violet")
        Down.Material = "Neon"
        Down.Anchored = true
        Down.CanCollide = false
        Down.TopSurface = "Smooth"
        Down.BottomSurface = "Smooth"
        Down.Size = Vector3.new(10,10,10)
        Down.Transparency = 1
        local fix2 =  game.ReplicatedStorage.EmergencySkillRemove:Clone()
	    fix2.Parent = Down
        Down.Parent = game.workspace
        

        Down.CFrame = Player.Character.UpperTorso.CFrame

        local em = Instance.new("SpecialMesh")
        em.MeshType = "Sphere"
        em.Scale = Vector3.new(8,8,8)
		em.Parent = Down

      
		 for Shrink = 1,40 do
		em.Scale = em.Scale - Vector3.new(0.2,0.2,0.2)
		Down.Transparency = Down.Transparency - 0.02
		wait(0.0001)
		end
		
	local sound2 = Instance.new("Sound")
	sound2.SoundId = "http://www.roblox.com/asset/?id=342472444"
	sound2.Parent = Player.Character.UpperTorso
	sound2.Volume = 4
	sound2:Play()
	
	
	   Player.NonSave.GodOn.Value = false
	
	wait(0.5)
	
	animTrack:Stop()
	Player.Character.Humanoid.WalkSpeed = 16
		Player.Character.Humanoid.BodyDepthScale.Value = 1
		Player.Character.Humanoid.BodyHeightScale.Value = 1
		Player.Character.Humanoid.BodyWidthScale.Value = 1
		Player.Character.Humanoid.HeadScale.Value = 1
		game.Debris:AddItem(Down,3)
--		Player.Character.Humanoid.MaxHealth = 100
		
		
		
		end	
	end
	
		
		
		
		
		
		
		
		



mouse.KeyDown:connect(GodMode)
mouse.KeyDown:connect(GodModeOff)

(2nd makes question too long, but it does the same thing except make the player size to 4 instead of 2.)