How do I forcefully trip the player and make sure they don't stand up?

I'm trying to make a script that forces the player to trip and not get up, but the player is able to advoid the trip if they hold jump, this is my script

while wait() do
    if Player.Stats.Ragdolled.Value == false then
        for i,v in pairs(Character:GetDescendants()) do
            if v:IsA("Humanoid") then
                v.PlatformStand = false
            end
        end
        break
    end
    for i,v in pairs(Character:GetDescendants()) do
        if v:IsA("Humanoid") then
            v.PlatformStand = true
        end
    end
end