Part Positioning Issues?

If you change the position it will adjust itself so It doesn't go inside a part. CFrame acts differently: It forces the part to go any point you tell it to. Also, you can use CFrame to teleport players.

ting = true
Dist = 100

function Touch(hit)
    if ting == true then
    local hurt = game.Lighting.PainScript:Clone()
    local boom = Instance.new("Explosion", script.Parent)
    local pain = Instance.new("Part", script.Parent)
    hurt.Parent = pain
    hurt.Disabled = false
    pain.Anchored = true
    pain.Size = Vector3.new(Dist,Dist,Dist)
    pain.Transparency = 0
    pain.CFrame = CFrame.new(0,0,0) --It will be inside of the baseplate. If this doesn't work then replace this line with pain.Position = CFrame.new(Vector3.new(0,0,0)) Also, notice how it says part.CFrame instead of part.Position. And I also replaced Vector3.new with CFrame.new.
    boom.Position = script.Parent.Position
    boom.BlastPressure = 10
    boom.DestroyJointRadiusPercent = 0
    ting = false
    wait (2)
    ting = true
    end
end

script.Parent.Touched:connect(Touch)

Remember when I told you about the teleporting? Well, you can do that with characters by changing their CFrame to a specific point.

workspace.Player1.Torso.Position = Vector3.new(0,0,0) --This would kill the players.

workspace.Player2.Torso.CFrame = CFrame.new(0,0,0) --This player would live.

Hope this helps!

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