How can i make a explosion that unjoint parts?

Some help with explosions from the Dev...

Fires when the Explosion hits a BasePart within its Explosion.BlastRadius. Returns the part hit along with the distance of the part from Explosion.Position. Note that the effect of an Explosion is not disrupted by obstacles, this means parts shielded behind other parts will still be hit, even if the BasePart they are shielded behind is anchored. This event will also fire when Explosion.BlastPressure is equal to zero. This means developers can program their own custom behavior for explosions by eliminating the explosion’s influence on BaseParts and Terrain. Note that this event will fire for every BasePart hit. This means it can fire multiple times for the same player character (as the character Model is made up of multiple parts). For this reason when dealing custom damage using the Explosion.Hit event it’s recommended to implement a check to see if the character has already been hit by the Explosion.

local function customExplosion(position, radius, maxDamage)
    local explosion = Instance.new("Explosion")
    explosion.BlastPressure = 0 -- this could be set higher to still apply velocity to parts
    explosion.DestroyJointRadiusPercent = 0 -- joints are safe
    explosion.BlastRadius = radius
    explosion.Position = position

-- set up a table to track the models hit
    local modelsHit = {}

    -- listen for contact
    explosion.Hit:Connect(function(part, distance)
        local parentModel = part.Parent
        if parentModel then 
            -- check to see if this model has already been hit 
            if modelsHit[parentModel] then
                return
            end
            -- log this model as hit
            modelsHit[parentModel] = true

            -- look for a humanoid
            local humanoid = parentModel:FindFirstChild("Humanoid")
            if humanoid then
                local distanceFactor = distance / explosion.BlastRadius -- get the distance as a value between 0 and 1
                distanceFactor = 1 - distanceFactor -- flip the amount, so that lower == closer == more damage
                humanoid:TakeDamage(maxDamage * distanceFactor) -- TakeDamage to respect ForceFields
            end 
        end
    end)

    explosion.Parent = game.Workspace
end