How do you limit this brick to hit multiple people without doing extra damage?

I have this fireball script that puts itself into the fireball projectile when shot on another script how would i limit this to hit multiple people?

wait(.025)
local radius = 13 -- in studs
local par = script.Parent
local explosion = script:WaitForChild('Explosion')
local debounce = false
local hitbounce = false

function hit()
    local brix = Instance.new('Part', workspace:WaitForChild('Debris'):WaitForChild('AoE'))
    brix.CanCollide = false
    brix.Anchored = true
    brix.Transparency = 1
    brix.Shape = 'Ball'
    brix.Name = 'AoE'
    brix.Size = Vector3.new(radius,radius,radius)
    brix.CFrame = par.CFrame
    local ex = explosion:Clone()
    ex.Parent = brix
    ex:Play()
    local kaboom = Instance.new('Explosion', brix)
    kaboom.BlastPressure = 0
    kaboom.Position = brix.Position
    par:Destroy()
    brix.Touched:connect(function(part)
        if hitbounce == false and part.Parent:FindFirstChild('Humanoid') and part.CanCollide == true then
            hitbounce = true
            local human = part.Parent:FindFirstChild('Humanoid')
            human:TakeDamage(65)
        end
    end)
    wait(ex.TimeLength)
    brix:Destroy()
end

par.Touched:connect(function(part)
    if part.Parent:FindFirstChild('Humanoid') and debounce == false and part.CanCollide == true then
        hit()
        elseif debounce == false and part.CanCollide == true then
        debounce = true
        hit()
    end
end)

wait(2)
par:Destroy()