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Why some CCFL Inverter circuit will broke under no load?

Why some CFL Inverter circuit will broke under no load?
I buy a UV Tube with CFL Inverter.
When I pull out the UV Tube the circuit were shutdown.
I want to know what's wrong in this circuit if I run it on no load

Break permanently, or just without a load ? I would guess if its not permanent, it can detect the fact that someone is playing with it open circuit, and shuts down. Equally, there are some designs that will try and develop an "infinite" output voltage in O/C conditions, and fry their output transistors permanently.
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Agreed; they have some clever feedback to ensure the correct voltage and current are applied to a bulb. No bulb = no limit.
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