My Time Bomb is not working as intended Help?

I am using the pre made time bomb roblox has to offer us, I am modifying it so the owner is not able to kill himself. However it is not working as intended, when I test this out yes the owner doesn't have its limbs blown out or is killed but neither is anybody else. How could I make it where only the owner is safe from the explosion?

local Tool = script.Parent
    local vCharacter = Tool.Parent
    local vPlayer = game.Players:playerFromCharacter(vCharacter)

function blowUp()


    local sound = Instance.new("Sound")
        sound.SoundId = "rbxasset://sounds\\Rocket shot.wav"
        sound.Parent = script.Parent
        sound.Volume = 1
        sound:play()
    explosion = Instance.new("Explosion")
    explosion.BlastRadius = 12
    explosion.BlastPressure = 1000000 
    explosion.DestroyJointRadiusPercent = 0
    explosion.Hit:Connect(function(part, distance)
        local hum = part.Parent:FindFirstChild("Humanoid")
        if hum ~= vPlayer.Humanoid then
            hum:TakeDamage(100)
            explosion.DestroyJointRadiusPercent = .5
        end
    end)