BodyVelocity makes player fall over when moving against a part

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#1

https://gyazo.com/10e27b06533baa9110fcf8dc1bc9efafhttps://i.gyazo.com/10e27b06533baa9110fcf8dc1bc9efaf.gif(image larger than 10 MB)

https://gyazo.com/6d67cf5bf2eb760caad785bb723fd815https://i.gyazo.com/6d67cf5bf2eb760caad785bb723fd815.gif(image larger than 10 MB)

Everytime i roll against something solid I fall over. Here are my velocity settings:

Velo.MaxForce = Vector3.new(1e5,0,1e5)
local PPX = Player.Character.HumanoidRootPart.CFrame.LookVector.X
local PPZ = Player.Character.HumanoidRootPart.CFrame.LookVector.Z				
local rolldirection = Vector3.new(PPX * 20, 0 , PPZ * 20)	
Velo.Velocity = rolldirection

Turning MaxForce up and down both do not work. What else can i do?
Any ideas on how to fix this?

#2

for anyone who runs into a similar problem, my bodyparts where all massless. Fixed it by removing this line of code;

for i,v in ipairs(Character:GetDescendants())do
	if v:IsA("BasePart")then
		v.Massless = true
	end
end