hook.Add("Think", "pyth_cry", function()
    for key, ent in pairs(ents.GetAll()) do
    local phys = ent:GetPhysicsObject()

    if phys:IsValid() then
        local a = phys:GetVelocity()
        local b = phys:GetAngleVelocity()

        if
        math.BadNumber(a.x) or
        math.BadNumber(a.y) or
        math.BadNumber(a.z) or
        math.BadNumber(b.x) or
        math.BadNumber(b.y) or
        math.BadNumber(b.z)
        then
        print("ah nope")
        phys:EnableMotion(false)
        phys:SetVelocity(vector_origin)
        end
    end
    end
end)

--!l hook.Add("Think",1,function() phys:AddVelocity(VectorRand()/math.huge)end)