R15 Ragdoll Glitches out when hit hard

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I am trying to create a ragdoll game. I have the scripts i want already but ive come across a weird issue that my friends have come to notice.

When using r15, npcs or players, if the player hits an object at a high speed, the BallSocketConstraints seem to freak out and cause the character to act funny.\

here is a video.

I have attempted many solutions Ive seen but no post has had any problems that I have. I have seen many games not have this problem. I have 0 clue why this is happening.

Here is the function of the script that ragdolls the player on the server:

function fall(player, char)
	for v,i: Instance in pairs(char:GetDescendants()) do

		if i:IsA("BasePart") or i:IsA("MeshPart") then
			if i:CanSetNetworkOwnership() then i:SetNetworkOwner() end
			if i.Name ~= "HumanoidRootPart" and not string.find(string.lower(i.Name), "torso", 1) and not string.find(i.Name, "Handle", 1) then
				local fake = Instance.new("Part")
				fake.Transparency = 1
				fake.Parent = i
				fake.Name = "FAKE"
				fake.Size = i.Size*0.9
				local weld = Instance.new("Weld")
				weld.Name = "FAKE"
				weld.Part0 = i
				weld.Part1 = fake
				weld.Parent = i

		if string.find(i.Name, "Upper") and i.Parent:FindFirstChildOfClass("Humanoid") then
			if i:FindFirstChild("FAKE") then
			i.CanCollide = false

		if i:IsA("Motor6D") and i.Parent.Name ~= "HumanoidRootPart" then
			local w: Motor6D = i
			local part0 = w.Part0
			local part1 = w.Part1

			local b = Instance.new("BallSocketConstraint")
			b.LimitsEnabled = true
			b.TwistLimitsEnabled = true
			b.UpperAngle = 20

			local a0 = Instance.new("Attachment")
			a0.Name = "ragdollAttachment"
			local a1 = Instance.new("Attachment")
			a1.Name = "ragdollAttachment"
			a0.Parent = part0
			a1.Parent = part1

			a0.Position = w.C0.Position
			a1.Position = w.C1.Position

			b.Parent = part0

			b.Attachment0 = a0
			b.Attachment1 = a1
			w.Enabled = false

Any help is appreciated!

SOLVED: It was not a physics bug. it was me. always me. I forgot to implement the check to verify that there is no extra BallSocketConstraints in the model, which causes the player to freak out. it works perfectly now!


Is this ragdoll script very laggy? Could I implement to my game? I always wanted a ragdoll like this in my tornado game.

nope, its very smooth, it runs the physics on the server automatically. I am willing to share the script(s) but it will need a lot of adjustments. It works with r15 and r6.


Wow, it’s very smooth and nice.

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